Location: MSHCP > VOLUME 4 > 4.0 ENVIRONMENTAL IMPACTS / ENVIRONMENTAL CONSEQUENCES

4.0 ENVIRONMENTAL IMPACTS / ENVIRONMENTAL CONSEQUENCES

This document has been prepared as a joint EIR/EIS as a result of the combined local, State, and federal actions associated with the approval of the proposed MSHCP. As stated in the Purpose and Need (Section 1.0), the co-lead agencies are the County of Riverside, pursuant to CEQA, and the USFWS, pursuant to NEPA. A consistent format was used to assist the reader in understanding the implications of the proposed MSHCP and alternatives. This section provides a narrative of how the analysis was undertaken and presents the organization of the environmental consequences section of the document.

This section of the EIR/EIS forms the scientific and analytical basis for the evaluation of the proposed MSHCP and alternatives. Topics analyzed include biological resources; land use and planning; population, housing and employment; public services (fire protection and parks); and transportation and circulation. Sections are presented in the following format.

Thresholds of Significance/Criteria for Determining Significance

The criteria for determining significance provide a threshold at which a significant impact will occur. Criteria will differ among issues.

Impact Analysis per Issue Statement

This section of the document provides an evaluation of project-specific and alternatives impacts and determines significance based on documented thresholds levels. The Proposed Project/Action is the MSHCP as described in Section 2.3.1 of this EIR/EIS, to include the whole of the action (policy statements, issuance of incidental take authorizations, and the implementing agreement).

According to NEPA, each of the alternatives to the Proposed Action must be analyzed in equal detail as the Proposed Action. In this Section of the EIR/EIS, each environmental issue described in Section 3.0 of this document is analyzed with regard to potential effects related to the proposed MSHCP (Proposed Action) and to each of the four alternatives as well (Listed, Proposed, and Strong Candidate Species Alternative; Listed and Proposed Species Alternative; Existing Reserves Alternative; and the No Project/No MSHCP Alternative).

The Proposed Action and the alternatives are analyzed for direct, indirect, and cumulative impacts/effects.

Mitigation Measures

For those impacts that were determined to be significant, mitigation is provided in this section of the impact analysis.

Level of Significance after Mitigation

An analysis of the significance of an effect after mitigation is applied is discussed in this section of the impact analysis. The outcome of the analysis is to determine whether there is a significant effect caused by the proposed project or its alternatives that cannot be mitigated to below a level of significance.

4.1 Biological Resources

4.1.1 Introduction

This analysis

Vegetation Communities
Cores and Linkages
Listed, Covered Species
Relationship to Adopted or
Non-Listed, Covered Species Approved HCPs and NCCPs
Non-Covered Species
Edge Effects

for biological resources applies the applicable threshold of significance to the potential effects for the Project and each alternative (with the exception of the No Project Alternative) for each of the following biological issues:

Subheadings for each of these issues appear in the analysis section for the project and alternatives. The No Project Alternative discussion is structured differently, since that alternative does not involve issuance of take authorization. The No Project Alternative discussion is formatted to address existing local, State and federal regulations, and the effects of the application of these regulations to future growth in the MSHCP Area.

Impact Analysis Considerations

Consideration in evaluating impacts to sensitive vegetation communities is based on the vegetation data base developed by Pacific Southwest Biological Services (PSBS, 1995) which is based on 1992-1993 aerial photographs. It is important to distinguish between “vegetation communities” and “habitats.” The terms often are used interchangeably, but a vegetation community precisely refers to definable and consistent assemblages of plant species, whereas habitat is the native environment of a plant or animal species.

The vegetation map as incorporated into the MSHCP database is depicted in Figure

4.1.1. This map was created by PSBS and mapped by KTU+A in 1995. As stated in the February 1995 PSBS/KTU+A Western Riverside County Multi-Species Habitat Conservation Plan Phase I Information Collection and Evaluation Report, this map was created by compiling all known vegetation information within the Plan Area. These data sources include biological survey reports, Weislander vegetation maps, satellite imagery and the Dangermond/RECON data set. Methods used to create and interpret vegetation data included aerial photograph interpretation, edge matching, digitizing, and geographically registering the data. In areas of concern, ground truthing occurred. Vegetation types were classified according to Holland. It should be noted that the vegetation map is representative of conditions at the time of the study; existing conditions today may differ from those represented on the map. The MSHCP vegetation map is limited by the time frame within which the data were assembled as well as the precision of those data. The Project encompasses all of western Riverside County, a

total of 1,966 square miles. Due to the large scale of the Project, it is simply not possible to map the Project area with parcel-level precision. Rather, vegetation mapping was based on a broad scale, as has been done with other criteria-based MSHCPs that cover large geographic regions, such as the San Diego MSCP. The vegetation map represents conditions at the time the data were assembled, in this case 1991-1995; the current extent and character of vegetation communities may differ from that depicted on the MSHCP vegetation map. Published and anecdotal data suggest that ecosystem state transition is occurring within some portions of the Plan Area - in particular, fire suppression has resulted in the conversion of frequently burned chaparral and coastal sage scrub to grassland and in shifts from Ponderosa pine and Jeffrey pine to incense cedar and white fir (Minnich, et al., 1995; Keeley, 1990; Zedler, et al., 1983). The MSHCP incorporates features to update the vegetation map as new information is obtained, such as the development of a new vegetation map as part of the MSHCP Monitoring Program. The timing and methodology for developing this map is described in Section 5.3 of this document. The criteria-based format of the MSHCP was designed, in part, to address changing data and/or conditions. The MSHCP calls for assembly of 153,000 acres of Additional Reserve Lands from within an approximately 300,000-acre Criteria Area. Reserve Assembly will involve review of a variety of project-specific vegetation data to refine and guide the Reserve Assembly process. This criteria-based format differs somewhat from large-scale NCCPs/HCPs for which a specific reserve boundary is delineated on a map at the time of permit issuance. Under that type of approach, validation of the vegetation map at the landscape level may be more important than under the criteria-based approach selected for this MSHCP. The organizational structure established for the MSHCP, as described in Section 6.6 of this document, also provides opportunities to incorporate new information during the term of the MSHCP Permit(s).

Consideration in evaluation of impacts to species is based on the MSHCP Species Occurrence Database. The University of California at Riverside (UCR) has assembled a species occurrence database for use during the MSHCP planning process. This database is accessible via http://ecoregion.ucr.edu/mshcp, and is a clearinghouse for biological information for the MSHCP. Occurrence information has been compiled from museum records, USFWS data, published and unpublished accounts, environmental impact reports, and field notes of local naturalists. As of August 2001, this database contained over 12,800 records. It should be noted that the species occurrence data represent known records of species observations. Actual presence and distribution of individual species within the MSHCP Area are likely greater than those reflected in the species occurrence database. Therefore, the analysis contained in this EIR/EIS also includes consideration of vegetation community associations for covered species. As noted in later sections of this analysis, impacts to non-covered species are not quantifiable due to the lack of information available for these species.

Considerations in evaluating reserve design and biological function of cores and linkages involve the following general principles of conservation biology:

Conservation of focus species and their habitats throughout the MSHCP Area;
Conservation of large habitat blocks;
Maintenance of habitat diversity;
Contiguity and connectivity of Conservation Areas; and
Protection of Conservation Areas from encroachment and invasion by nonnative species.

Specific considerations in evaluating cores and linkages are based on the discussion of the function of cores and linkages contained in Section 3.1 of the MSHCP. The effects of the various alternatives on identified cores and linkages are based on the configuration of the Conservation Areas proposed under each alternative. The evaluation of impacts to cores and linkages is considered in the report prepared by the California Wilderness Coalition in November 2000. The report identified the location and major threats to wildlife movement corridors throughout the State of California (California Wilderness Coalition, 2000). The report identified 232 linkages within the State, of which 17 are located within the MSHCP Area. As part of this analysis, a review of the 17 linkages was conducted to compare reserve features of the MSHCP to the linkages identified by the California Wilderness Coalition.

The evaluation of impacts related to Covered Activities is based on the inventory of Covered Activities contained in Section 7.0 of the MSHCP. As stated below, it is assumed that the same list of covered activities would apply to all of the plan alternatives.

Consideration of regional resource planning is based on the following existing planning efforts. As shown in Figure 4.1.2, resource conservation planning efforts surrounding the MSHCP Area consist of the following:

(1) San Bernardino Preliminary MSHCP Planning Area. This conservation planning effort is adjacent to the northern border of the MSHCP Area and encompasses approximately 500 square miles containing six unique habitat types, six State endangered or threatened species, 13 federally endangered or threatened species, and over 53 species of special concern. San Bernardino County, through its Natural History Museum staff, has been conducting biological and botanical surveys for the past several years in order to identify habitat needs and requirements for the various sensitive species.

(2) Coachella Valley MSHCP Alternative 2. This conservation planning effort covers the central portion of Riverside County (adjacent to the eastern border of the MSHCP Area) which is the westernmost edge of the Sonoran Desert. The plan area covers 1,136,261 acres, a diverse mixture of desert and mountain habitats and 28 species in the Coachella Valley. The Coachella Valley Association of Governments (CVAG) has prepared an Administrative Review Draft which reflects the work of the Scientific Advisory Committee, the Implementation Subcommittee, and the Project Advisory Group. After receiving comments from the local, State, and federal agencies, a Public Review Draft and Draft EIR/EIS is scheduled for release in 2002.

(3) County of San Diego Multiple Habitat Conservation and Open Space Program (MHCOSP). The MHCOSP is adjacent to the southern border of the MSHCP Area and the eastern border of the San Diego MSCP North County Subarea. The County of San Diego has deferred planning for this subregion until it completes its North County Subarea Plan MSCP amendment.

(4) San Diego Multiple Species Conservation Program (MSCP) North County Subarea. In December 1996, the California Department of Fish and Game (CDFG) and the U.S. Fish and Wildlife Service (USFWS) approved the San Diego MSCP habitat plan that encompasses 582,000 acres and establishes a 172,000-acre preserve system in southwestern San Diego County. This subregional plan covers 85 species of plants and animals and 23 vegetation types. The San Diego MSCP contains the North County Subarea, which is adjacent to the southern border of the Riverside County MSHCP Area and the western border of the MHCOSP County of San Diego. Lands formerly within the Multiple Habitat Conservation Program (MHCP) area have been redefined as the North County Subarea of the San Diego MSCP and will be amended into the MSCP. Additional biological information has been collected, and a science advisory process is underway. A subarea plan is anticipated to be provided for review shortly.

(5) Proposed Orange County Southern Subregion NCCP Planning Area. Orange County and major landowners are preparing a subregional preserve plan (NCCP/HCP) and special area management plan/master streambed alteration agreement that will integrate wetlands and endangered species permits. The Southern Subregion conservation planning effort is adjacent to the southern half of the western border of the MSHCP Area. An update to Orange County's General Plan and Zoning Ordinance is also underway. A public workshop was held in December 2001, to discuss alternatives that should be addressed for each of the three planning efforts in southern Orange County. Currently the Southern Subregion NCCP is in the public scoping process for the EIS/EIR that is anticipated to be provided for public review in the next few months.

(6) Orange County Central-Coastal Subregion NCCP Planning Area. This subregion NCCP borders the northern half of the western border of the MSHCP Area. This conservation plan was approved in July 1996 and establishes a 37,380-acre reserve system that includes significant areas of 12 major habitat types and covers 39 sensitive plant and animal species.

(7) Orange County Northern Subregion. This subregion borders a small portion of the northwestern corner of the MSHCP Area. This subregion is not a part of Orange County's NCCP plan, but a Chevron USA 4(d) permit concurrence letter was issued by the Wildlife Agencies that will allow Chevron to complete oil field abandonment operations in this subregion. The permit also commits Chevron to setting aside and managing a 28-acre preserve area for California gnatcatchers and funding cowbird control efforts.

4.1.2 Assumptions

The analysis of impacts to biological resources of the Proposed Action-MSHCP and the Plan alternatives - is also based on the following assumptions:

109) All of the following policies related to avoiding or reducing biological impacts, which are outlined in the MSHCP, would be incorporated into all of the proposed alternatives, with the exception of the No Project Alternative and the Existing Reserves Alternative:

Wetlands avoidance and minimization (MSHCP, Section 6.1.2);
Narrow endemics survey/conservation requirements (MSHCP, Section 6.1.3);
Additional survey requirements (MSHCP, Section 6.3.2); and
Guidelines pertaining to Urban/Wildlands Interface (MSHCP, Section 6.1.4).

110) With the exception of the No Project Alternative, all of the alternatives are assumed to include Adaptive Management and Monitoring for the species that are covered under each of the respective alternatives consistent with the measures described for those species in Section 5.0 of the MSHCP.

111) Implementation strategy (i.e., Criteria-based plan) is assumed to be the same for all of the alternatives, with the exception of the No Project Alternative and the Existing Reserves Alternative. It is assumed that Criteria would be established for these alternatives that would result in conservation in the same manner as the MSHCP Criteria.

112) Covered activities are assumed to be the same under all of the alternatives with the exception of the No Project Alternative and the Existing Reserves Alternative.

113) Through the MSHCP process, there has been a total of 254 species identified for analysis of potential conservation within the MSHCP Area. This includes the 247 species originally identified by the Wildlife Agencies early in the MSHCP development process, plus seven additional species considered in the planning process. It is assumed that the list of 254 species encompasses all species for which adequate information is available to conduct an analysis under CEQA and NEPA. Analysis of species other than the 254 identified that are not known to exist in the MSHCP Area, have not been identified, or have not been taxonomically distinguished, would involve speculation that is not within the scope of this analysis.

114) For the No Project Alternative, there would be no core/linkage system, no coordinated biological management, and no coordinated strategy for assembling contiguous blocks of reserve lands. Any conservation that would be achieved with the No Project Alternative would result from regulatory requirements imposed upon individual projects.

115) Lands defined as “Public/Quasi-Public” includes lands known to be in public ownership managed for conservation and/or open space value, or land contained in an existing reserve. Assembly of the public/quasi-public lands database revealed that approximately 347,000 acres of public/quasi-public lands are present within the MSHCP Plan Area, including approximately 200,000 acres of lands within the Cleveland or San Bernardino National Forests that are owned by the federal government and managed by the U.S. Forest Service. It is assumed that the same level of conservation and management that is described for the MSHCP would also occur under the other alternatives, with the exception of the No Project Alternative, with the only difference being the focus of management directed at the species covered under each of these alternatives.

116) For the purpose of this analysis, cumulative biological impacts are defined as those impacts resulting from development within the MSHCP Area as a result of build out of the County's and Cities' General Plans, in accordance with SCAG regional growth projections. The term of the MSHCP is proposed to be 75 years, and the MSHCP includes consideration of growth and development within the MSHCP Plan Area for build out of the General Plans. This analysis examines all of the alternatives under a General Plan build out scenario.

Therefore, the analysis of cumulative biological impacts of the Proposed Action and alternatives is assumed to be incorporated into the analysis of the alternatives themselves, since cumulative growth including build out of the General Plans in accordance with SCAG regional growth projections is considered in the MSHCP and the alternatives.

4.1.3 Thresholds of Significance/Criteria for Determining Significance

The following criteria are used to determine whether the Project or the alternatives would have significant impacts on biological resources. The impacts would be significant if implementation of the Project or the alternative being analyzed would:

Have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive, or special status species (including species listed as threatened or endangered) in local or regional plans, policies, or regulations, or by the CDFG or USFWS;
Have a substantial adverse effect on any wetlands or other sensitive natural vegetation community identified in local or regional plans, policies, or regulations or by the California Department of Fish and Game or the United States Fish and Wildlife Service;
Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, impede the use of native wildlife nursery sites, or obstruct genetic flow for identified planning species;
Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or State habitat conservation plan, either within the MSHCP Plan Area or in the surrounding region;
Introduce land use within an area immediately adjacent to the MSHCP Conservation Area that would result in substantial edge effects; or
Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance.

4.1.4 Impacts

MSHCP Proposed Project

Vegetation Communities. For the purposes of this analysis, vegetation types have been grouped into four primary categories: sensitive upland, wetland, forest, and agriculture. Sensitive upland communities include chaparral, coastal sage scrub, desert scrub, grassland (native grassland only, non-native grassland is not a sensitive community), and Riversidean alluvial fan sage scrub vegetation types. Wetland communities include meadows and marshes, playas and vernal pools, water and riparian scrub/woodland/forest vegetation types. Forest communities include montane coniferous forest, peninsular juniper woodland and scrub, and woodlands and forests.

For sensitive upland communities within the MSHCP Area, implementation of the proposed MSHCP would authorize take of 37 percent of chaparral, 48 percent of coastal sage scrub, 66 percent of desert scrub, 72 percent of grassland (including both native and non-native grassland), and 34 percent of Riversidean alluvial fan sage scrub (Table 4A).

For wetland communities within the MSHCP Area, the proposed MSHCP would authorize take of 76 percent of meadows and marshes, 15 percent of playas and vernal pools, 15 percent of water, and 26 percent of riparian scrub/woodland/forest. For forest communities within the MSHCP Area, the proposed MSHCP would authorize take of 31 percent of montane coniferous forest, and 32 percent of woodlands and forests. In addition, 88 percent of the agricultural land in the Plan Area would be authorized for take under the proposed MSHCP, as it would be outside the MSHCP Conservation Area and could be used for agricultural activities.

Table 4A - Summary of Impacts to Vegetation Communities
Vegetation Type	Total Acres in Plan Area	Proposed MSHCP Total Acres / % Within the Area Subject toTake Authorization	Listed, Proposed, and Strong Candidate Species Alternative Total Acres / % Within the Area Subject to Take Authorization	Listed and Proposed Species Alternative Total Acres / % Within the Area Subject to Take Authorization	Existing Reserves Total Acres / % Within the Area Subject to Take Authorization
Agriculture	169,480	149,460/88%	143,100/84%	143,100/84%	158,000/93%
Chaparral	434,950	162,670/37%	187,960/43%	200,560/46%	227,570/52%
Coastal Sage Scrub	156,450	74,730/48%	82,71053%	92,060/59%	121,890/78%
Desert Scrub	14,570	9,580/66%	13,100/90%	13,260/91%	13,260/91%
Grassland	154,140	111,320/72%	116,110/75%	120,120/78%	131,330/85%
Meadows and Marshes²	2,280	1,730/76%	1,850/81%	1,870/82%	1,950/86%
Montane Coniferous Forest	29,910	9,410/31%	9,400/31%	9,400/31%	9,430/31%
Playas and Vernal Pools	7,910	1,160/15%	2,060/26%	2,060/26%	4,990/63%
Riparian Scrub, Woodland and Forest	15,030	3,840/26%	5,660/38%	5,960/40%	7,760/52%
Riversidean Alluvial Fan Sage Scrub	7,940	2,710/34%	3,500/44%	3,520/44%	5,880/74%
Unknown	1,350	110/8%	110/8%	110/8%	120/9%
Water	12,210	1,870/15%	2,120/17%	2,200/18%	3,060/25%
Woodlands and Forests	34,300	10,80032%	11,780/34%	11,940/35%	13,530/39%
Developed or Disturbed Land	218,260	- -	- -	- -	- -
TOTALS	1,258,780	539,390³	579,470³	606,160³	698,770³
Notes: 1 Impacts associated with the No Project Alternative are presented separately. 2 Includes cismontane alkali marsh. 3 Totals exclude developed/disturbed land because no additional impact to biological resources would occur in these areas as a result of implementation of the Proposed MSHCP or alternatives. Source: Western Riverside County MSHCP, November 2002.

Certain features incorporated in the MSHCP would minimize to the extent feasible potential impacts to sensitive vegetation communities. These include assembly of an approximately 500,000-acre MSHCP Conservation Area encompassing Conserved Habitat. Conserved Habitat is defined as land that is permanently protected and managed for the benefit of the Covered Species with the Proposed Action under legal arrangements that prevent its conversion to other uses. The acreages of vegetation communities not authorized for take would be included as Conserved Habitat within the MSHCP Conservation Area. For example, while 31 percent of the montane coniferous forest would be in the take authorized area for the Proposed Action, 69 percent of the montane coniferous forest would be included in the MSHCP Conservation Area as Conserved Habitat. In general, inclusion of the majority of the forest communities as Conserved Habitat within the MSHCP Conservation Area would not result in a substantial reduction of these communities, therefore impacts are considered to be less than significant.

For the sensitive upland communities, inclusion of 63 percent of the chaparral within the MSHCP Conservation Area would not result in a substantial reduction of these communities given the large percentage of this vegetation community to be included as Conserved Habitat with the Proposed Action, the extensive acreage and wide distribution of this vegetation community in the Plan Area, and the relatively low numbers of listed species preferring this vegetation community within the Plan Area. For coastal sage scrub and Riversidean alluvial fan sage scrub, although 52 percent and 66 percent of these vegetation communities, respectively, would be included as Conserved Habitat, substantial impacts to coastal sage scrub and Riversidean alluvial fan sage scrub would remain due to the patchy distribution of these vegetation communities in the Plan Area and the relatively large numbers of sensitive species occurring in these vegetation communities. However, features incorporated into the proposed project, including the configuration of conserved lands, as well as adaptive management and monitoring, would reduce this impact to a less than significant level. The Project would reduce grassland (including native and non-native grassland) and desert scrub by 72 percent and 66 percent, respectively. Features incorporated into the proposed Plan, including the configuration of conserved lands, as well as adaptive management and monitoring, would reduce impacts to desert scrub to a less than significant level. However, as the vegetation coverage does not distinguish between native and non-native grassland, impacts to sensitive native grassland cannot be quantified independently, and significant impacts to this vegetation community may still occur.

With respect to agriculture, the Project and its associated take authorization could result in impacts to 88 percent of this vegetation community. However, agriculture is not a sensitive natural vegetation community. Thus, impacts to agriculture are not regarded as biologically significant. (For analysis of whether the Project and the alternatives will have significant impacts on agriculture, see Section 4.2. Impacts to species that utilize agricultural lands are discussed below in Impacts to Listed Covered Species and Impacts to Non-Listed Covered Species.)

Section 6.1.2 of the MSHCP discusses mapping of riparian, riverine, vernal pools, and other potentially jurisdictional wetland areas as part of the CEQA review of applications for Covered Activities within the MSHCP Plan Area. The policy calls for avoidance and minimization of impacts to wetland habitat throughout the Plan Area in accordance with existing regulatory standards that call for conservation and mitigation of wetland functions and values. Together, inclusion of substantial acreages of wetland vegetation communities within the MSHCP Conservation Area, and implementation of the Riparian/Riverine/Vernal Pool policy incorporated in the MSHCP, would reduce identified impacts to wetland vegetation communities to a level below significance. Thus implementation of the MSHCP will not have a substantial adverse impact on any wetland or other sensitive natural community identified in local or regional plans, policies, or regulations or by the Wildlife Agencies.

Listed Covered Species. The proposed MSHCP Conservation Area encompasses approximately 500,000 acres, comprising 347,000 acres of public/quasi-public land and 153,000 acres of Additional Reserve Lands and conserves portions of all vegetation communities distributed throughout the MSHCP Plan Area. Representative vegetation communities from the seven bioregions in the Plan Area are conserved with the Proposed Action. No developed areas or disturbed habitats are proposed for conservation.

The MSHCP provides take authorization for covered species resulting from Covered Activities outside of the Criteria Area, as well as those Covered Activities that are consistent with the Criteria and permitted inside the Criteria Area. In addition, coverage is provided for certain activities within the Criteria Area and within existing public/quasi-public lands, including maintenance and minor improvements to existing roads, improvements related to planned roads, and limited future facilities, such as electrical, gas, water, sewer, flood control, and State Park facilities.

The MSHCP includes specific criteria for locating such facilities and provides guidelines for design of the facilities that would avoid or reduce impacts. The best available information has been used to include a quantitative analysis of the impacts from these facilities, which is included in the impacts associated with the Plan as a whole, as presented in Table 4A. It should be noted, however, that existing and future roadways within the Criteria Area, including General Plan Circulation Element Roads, CETAP facilities, and Caltrans facilities would not be included in the total acreage considered for conservation within the MSHCP Conservation Area.

As a result of issuance of the proposed 10(a) permit, the species identified in Table 4B could be legally taken by permitted jurisdictions where they occur outside of the MSHCP Conservation Area. Nineteen of the 83 covered wildlife species and 13 of the 63 covered plant species are listed under FESA or CESA. These 19 wildlife species and 13 plant species will be directly affected by the Plan because they will no longer receive protection outside of the MSHCP Conservation Area. The impacts to the 32 Listed Covered Species are quantified based on the best existing information available for known occurrences and potential suitable habitat for each Listed Covered Species (Table 4B). These impacts vary depending on the species. For example, as shown in Table 4B, implementation of the proposed take authorization would result in the potential direct loss of 45 percent of suitable habitat for the coastal California gnatcatcher. For vernal pool fairy shrimp, approximately 12 percent of suitable habitat occurring outside of the MSHCP Conservation Area would be directly affected, and no known localities would be affected.

Table 4B - Comparison of Effects on Listed Covered Species by Alternative
INVERTEBRATES/CRUSTACEANS
vernal pool fairy shrimp – Branchinecta lynchi MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 4,016 acres (60%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Vernal pool areas not included as part of the MSHCP Conservation Area would be subject to policies related to riparian/riverine and vernal pool habitats presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to vernal pools shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. One of the three known locations, upper Salt Creek, would be within the area subject to take authorization. Approximately 6,490 acres (90%) of suitable habitat including vernal pool habitat would be within the area subject to take authorization.
Riverside fairy shrimp – Streptocephalus woottoni MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 5,868 acres (33%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Wetland areas not included as part of the MSHCP Conservation Area would be subject to policies related to riparian/riverine and vernal pool habitats presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to vernal pools shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities in the back basin of Lake Elsinore would be within the area subject to take authorization. Approximately 6,765 acres (40%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Murrieta, Alberhill, and the back basin of Lake Elsinore. Approximately 9,690 acres (54%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization.
INVERTEBRATES/INSECTS
Quino checkerspot butterfly – Euphydryas editha quino MSHCP Project. Approximately 41,668 acres (38%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Wilson Creek, Tule Peak, Silverado, Oak Mountain, Warm Springs Creek, and Sage would be within the area subject to take authorization. Approximately 46,460 acres (43%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization. Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative, except approximately 49,640 acres (45%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would not be conserved include Tule Valley, Aguanga, Vail Lake, Paloma Valley, Murrieta Hot Springs, Sage, Wilson Valley, Murrieta, Temecula, Oak Mountain, and Warm Springs Creek. Approximately 82,509 acres (75%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization.
Delhi Sands flower-loving fly – Rhaphiomidas terminatus abdominalis MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 452 acres (90%) of suitable habitat including coastal sage scrub, Riversidean alluvial fan sage scrub, and grasslands co-occurring with Delhi soils would be within the area subject to take authorization. Approximately 791 acres (82%) of restorable habitat including agricultural lands cooccurring with Delhi soils would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Jurupa and Agua Mansa. Approximately 465 acres (93%) of suitable habitat including coastal sage scrub, Riversidean alluvial fan sage scrub, and grasslands cooccurring with Delhi soils would be within the area subject to take authorization. Approximately 830 acres (86%) of restorable habitat including agricultural lands cooccurring with Delhi soils would be within the area subject to take authorization. Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Mira Loma, Agua Mansa, and Jurupa. Approximately 479 acres (95%) of suitable habitat including coastal sage scrub, Riversidean alluvial fan sage scrub, and grasslands co-occurring with Delhi soils would be within the area subject to take authorization. Approximately 957 acres (99%) of restorable habitat including agricultural lands co-occurring with Delhi soils would be within the area subject to take authorization.
FISH
Santa Ana sucker – Catastomus santaanae MSHCP Project. None of the core population areas, spawning areas, dispersal, or refuge areas would be within the area subject to take authorization. Approximately 540 acres (6%) of suitable habitat that includes water habitat would be within the area subject to take authorization. Riverine areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project.
AMPHIBIANS
arroyo toad – Bufo californicus MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 296 acres (16%) of suitable breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Approximately 2,320 acres (25%) of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitats. Localities that would be within the area subject to take authorization. include Bautista Creek, San Juan Creek, Arroyo Seco, Temecula Creek, and Tenaja Creek. Approximately 415 acres (22%) of breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Approximately 2,510 acres of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization. Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative except approximately 435 acres (23%) of breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Approximately 2,605 (28%) acres of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization. Existing Reserves. Localities that would be affected include Vail Lake, San Jacinto River, Indian Creek, San Juan Creek, Arroyo Seco, Temecula Creek, Wilson Creek, Tenaja Creek, and Bautista Creek. Approximately 415 acres (22%) of breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub be within the area subject to take authorization. Approximately 2,510 acres of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization.
California red-legged frog – Rana aurora draytonii MSHCP Project. Approximately 47 acres (6%) of suitable habitat including playas and vernal pools riparian scrub, Riversidean alluvial fan sage scrub, and open water would be within the area subject to take authorization. Approximately 9,370 acres (19%) of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project.
mountain yellow-legged frog – Rana mucosa MSHCP Project. Individuals occurring outside the MSHCP Conservation Area would bewithin the area subject to take authorization. Approximately 140 acres (29%) of primaryhabitat including riparian scrub and woodlands and forests occurring above 1,200 feet inthe San Jacinto Mountains would be within the area subject to take authorization.Approximately 11,460 acres (26%) of secondary habitats including montane coniferousforests and woodlands and forests occurring above 1,200 feet in the San JacintoMountains would be within the area subject to take authorization. Riparian areas notincluded as part of the MSHCP Conservation Area would be subject to the policiesrelated to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of theMSHCP, Volume I, and impacts to riparian areas shall be avoided and minimization inaccordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project.
REPTILES
southern rubber boa – Charina bottae umbratica MSHCP Project. Incidental take of the southern rubber boa is difficult to quantify due to limited knowledge of the species distribution within the Plan Area, and the fact that losses may be masked by fluctuations in abundance and distribution during the life of the permit. However, the maximum level of take of the southern rubber boa can be anticipated by the loss of habitat for this species. Approximately 155 acres (5%) of primary habitat, including chaparral, grassland, montane coniferous forest, riparian scrub, woodland and forest, and non-riparian woodland and forest, would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project.
BIRDS
Swainson's hawk – Buteo swainsoni MSHCP Project. Localities at Winchester would be within the area subject to take authorization. Approximately 257,220 acres (57%) of suitable habitat including agriculture field crop lands, grassland, desert scrub, Riversidean alluvial fan sage scrub, coastal sage scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Winchester would be within the area subject to take authorization. Approximately 270,203 acres (68%) of suitable habitat including agriculture field crop lands, grassland, desert scrub, Riversidean alluvial fan sage scrub, coastal sage scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Winchester, Badlands, and Temecula Creek would be within the area subject to take authorization. Approximately 280,545 acres (70%) of suitable habitat including agriculture field crop lands, grassland, desert scrub, Riversidean alluvial fan sage scrub, coastal sage scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Sedco Hills, Temecula Creek, Vail Lake, Wilson Valley, Motte-Rimrock Badlands, Lakeview Mountains, Sage, Wildomar, and Winchester. Approximately 335,770 acres (84%) of suitable habitat, including agriculture field crop lands, grassland, cismontane alkali marsh, playas and vernal pools, Riversidean alluvial fan sage scrub, coastal sage scrub, peninsular juniper woodland and scrub, and riparian scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.
mountain plover (wintering) – Charadrius montanus MSHCP Project. Localities that would be affected include Winchester and Double Butte. Approximately 1,160 acres (15%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,053 acres (26%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Localities that would be affected include Winchester, Double Butte, and Lakeview Mountains. Approximately 2,053 acres (26%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Localities that would be affected include Winchester, Double Butte, Lakeview Mountains, upper Salt Creek/San Jacinto Valley, and Menifee/Perris/Nueveo/Mystic Lake. Approximately 4,980 acres (63%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization.
western yellow-billed cuckoo – Coccyzus americanus occidentalis MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 2,580 acres (22%) of suitable habitat including southern cottonwood/willow riparian, southern sycamore/alder riparian, riparian scrub, riparian forest, and southern willow scrub within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Surveys for western yellow-billed cuckoo will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. Western yellow-billed cuckoo located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 6.1.2 of the MSHCP, Volume I. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 5,730 acres (49%) of suitable habitat including southern cottonwood/willow riparian, southern sycamore/alder riparian, riparian scrub, riparian forest, and southern willow scrub within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.
southwestern willow flycatcher – Empidonax traillii extimus MSHCP Project. A total of 5 of 17 localities would be within the area subject to take authorization; however, the localities are located outside suitable habitat areas within existing residential/urban/exotic areas, non-native grassland, or open water. Approximately 3,220 acres (23%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be affected throughout the MSHCP Area. Surveys for southwestern willow flycatcher will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. Southwestern willow flycatcher located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 6.1.2 of the MSHCP, Volume I. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to wetland shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Potrero Creek and Santa Margarita River would be within the area subject to take authorization. Approximately 4,735 acres (34%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Potrero Creek, Santa Margarita River, and Temecula Creek would be within the area subject to take authorization. Approximately 4,990 acres (36%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Potrero Creek, Temecula Creek, Vail Lake, Temescal Wash, Alberhill Creek, Murrieta Creek, Santa Margarita River, and Bautista Creek would be within the area subject to take authorization. Approximately 6,610 acres (48%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be within the area subject to take authorization.
peregrine falcon – Falco peregrinus MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. However, no impacts to raptor nests would occur. Approximately 2,140 acres (12%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization. Riparian and riverine areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian and riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,387 acres (13%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,475 acres (14%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 3,330 acres (19%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization.
bald eagle – Haliaeetus leucocephalus MSHCP Project. Two localities at Lake Riverside and Lake Hemet would be within the area subject to take authorization. Approximately 2,140 acres (12%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization. Riparian and riverine areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian and riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,390 acres (13%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,475 acres (14%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Three localities at Lake Riverside, Lake Hemet, and Vail Lake would be within the area subject to take authorization. Approximately 3,840 acres (21%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization.
coastal California gnatcatcher – Polioptila californica californica MSHCP Project. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road. Approximately 63,700 acres (45%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road, and El Sobrante Landfill. Approximately 70,980 acres (50%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road, and El Sobrante Landfill. Approximately 78,450 acres (56%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road, El Sobrante Landfill, Alberhill, North Peak Conservation Bank, Gavilan Plateau, Canyon Lake, and Sedco Hills. Approximately 112,260 acres (80%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization.
least Bell's vireo – Vireo bellii pusillus MSHCP Project. Localities at Mockingbird Canyon would be within the area subject to take authorization. Approximately 2,780 acres (23%) of suitable habitat including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Surveys for least Bell's vireo will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. Least Bell's vireos located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 of the MSHCP, Volume I. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Mockingbird Canyon, Potrero Creek, and Tucalota Creek would be within the area subject to take authorization. Approximately 4,087 acres (33%) of suitable habitat, including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Mockingbird Canyon, Temecula Creek, Potrero Creek, and Tucalota Creek would be within the area subject to take authorization. Approximately 4,309 acres (35%) of suitable habitat, including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Mockingbird Canyon, Temecula Creek, Murrieta Creek, Temescal Wash, Vail Lake, Wilson Valley, San Timoteo Creek, Potrero Creek, Alberhill Creek, and Tucalota Creek would be within the area subject to take authorization. Approximately 6,350 acres (52%) of suitable habitat, including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.
MAMMALS
San Bernardino kangaroo rat – Dipodomys merriami parvus MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 1,785 acres (32%) of suitable habitat including coastal sage scrub and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Surveys for San Bernardino kangaroo rat will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. San Bernardino kangaroo rats located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 of the MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Bautista Creek and San Jacinto River would be within the area subject to take authorization. Approximately 4,357 acres (79%) of suitable habitat, including coastal sage scrub and Riversidean alluvial fan sage scrub would be within the area subject to take authorization.
Stephens' kangaroo rat – Dipodomys stephensi MSHCP Project. Localities at March Air Reserve Base (ARB), east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, and Double Butte would be within the area subject to take authorization. Approximately 11,850 acres (34%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at March ARB, east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, Cactus Valley, Badlands, Double Butte, and Warm Springs Creek would be within the area subject to take authorization. Approximately 11,850 acres (34%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at March ARB, east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, Cactus Valley, Badlands, Potrero Valley, Double Butte, Warm Springs Creek, Tule Valley, Badlands, Reche Canyon, and Lakeview Mountains would be within the area subject to take authorization. Approximately 14,350 acres (41%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at March ARB, east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, Cactus Valley, Badlands, Double Butte, Warm Springs Creek, Tule Valley, Badlands, Reche Canyon, Lakeview Mountains, Silverado Ranch, Motte-Rimrock, Wilson Valley, Potrero Valley, Aguanga, Bautista Creek, North Peak, Sedco Hills, Gavilan Hills/Plateau, and Sage/Wilson area would be within the area subject to take authorization. Approximately 20,390 acres (59%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization.
PLANTS
Munz's onion – Allium munzii MSHCP Project. Two of the 15 known localities located northeast of Alberhill and on privately-owned land would be within the area subject to take authorization. Approximately 15,825 acres (42%) of primary habitat in the Plan Area, including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands, would be within the area subject to take authorization. This is a species on the Narrow Endemics Plant list (Section 6.1.3). Surveys will be conducted as part of the project review process for public and private projects within the Narrow Endemic Plant Species survey area where suitable habitat is present (see Narrow Endemic Plant Species Survey Area Map, Figure 6-1 of the MSHCP, Volume I). Munz's onions located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.1.3, MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 17,430 acres (47%) of primary habitat in the Plan Area, including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 18,670 acres (50%) of primary habitat in the Plan Area, including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands, would be within the area subject to take authorization. Existing Reserves. Six of the 15 known localities located at Alberhill, De Palma Road, Bachelor Mountain, North Peak, northeast of Alberhill, and on privately owned land would be within the area subject to take authorization. Approximately 26,125 acres (70%) of primary habitat for Munz's onion in the Plan Area including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved, and surveys would not be required.
San Diego ambrosia – Ambrosia pumila MSHCP Project. One of the three known extant localities (east of Lake Street in the City of Elsinore) would be within the area subject to take authorization. Approximately 52,010 (70%) acres of primary habitat in the Plan Area, including grassland and playas and vernal pools, would be within the area subject to take authorization; however, 8,940 acres of this 52,010 acres would be subject to focused surveys for San Diego ambrosia. Newly identified populations would be conserved in accordance with the Narrow Endemics policy described within Section 6.1.3. MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 55,100 (75%) acres of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. All three of the known extant localities at Skunk Hollow, Alberhill Creek at Nichols Road, and east of Lake Street in the City of Elsinore would be within the area subject to take authorization. Approximately 62,940 (85%) acres of primary habitat in the Plan Area, including grassland and playas and vernal pools, would be within the area subject to take authorization.
San Jacinto Valley crownscale – Atriplex coronata var. notatior MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 1,370 acres (17%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys for San Jacinto Valley crownscale will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). San Jacinto Valley crownscale located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Existing Reserves. Localities at the San Jacinto River and Alberhill Creek near Lake Elsinore would be within the area subject to take authorization. Approximately 5,360 acres (65%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.
Nevin's barberry – Berberis nevinii MSHCP Project. Three of the 52 known localities (in the City of Riverside, Aguanga, and Temecula) would be within the area subject to take authorization. Approximately 3,990 acres (33%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys for Nevin's barberry will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). Nevin's barberry located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Four of the 52 known localities (in the City of Riverside, Aguanga, Temecula, and Jurupa Hills) would be within the area subject to take authorization. Approximately 4,620 acres (39%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Five of the 52 known localities (in the City of Riverside, Aguanga, Temecula, Jurupa Hills, and Badlands) would be within the area subject to take authorization. Approximately 4,920 acres (41%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Existing Reserves. Localities in the City of Riverside, Aguanga, Temecula, Jurupa Hills, San Timoteo/Badlands area, and Vail Lake would be within the area subject to take authorization. Approximately 9,730 acres (81%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.
thread-leaved brodiaea – Brodiaea filifolia MSHCP Project. Nine of the 30 occurrences would be within the area subject to take authorization. Approximately 1,370 acres (17%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). Thread-leaved brodiaea located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Existing Reserves. Twenty-two of the 30 occurrences (west of the Santa Rosa Plateau, associated with the vernal pools west of Hemet [upper Salt Creek] and associated with the San Jacinto River) would be within the area subject to take authorization. Approximately 5,360 acres (65%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.
Vail Lake ceanothus – Ceanothus ophiochilus MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 3,350 acres (20%) of primary habitat, including chaparral, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). Vail Lake ceanothus located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 3,870 acres (23%) of primary habitat, including chaparral, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 4,130 acres (25%) of primary habitat, including chaparral, would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Localities at Vail Lake would be within the area subject to take authorization. Approximately 7,720 acres (46%) of primary habitat, including chaparral, would be within the area subject to take authorization.
Mojave tarplant – Deinandra mohavensis (formerly known as Hemizonia mohavensis) MSHCP Project. Two of eight occurrences, including along the Banning Idyllwild Panoramic Highway and within the San Jacinto Mountains would be within the area subject to take authorization. Approximately 27,850 acres (26%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 32,200 acres (30%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 34,300 acres (32%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization. Existing Reserves. Five of eight occurrences, including along the Banning Idyllwild Panoramic Highway, within the San Jacinto Mountains, and near the San Jacinto River east of Hemet, would be within the area subject to take authorization. Approximately 35,000 acres (32%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization.
slender-horned spine flower – Dodecahema leptoceras MSHCP Project. Of the 27 University of California at Riverside (UCR) database and herbarium records, 12 of the occurrences at Gavilan Plateau, north of Meadowbrook, Temescal Canyon, Lake Elsinore, Valle Vista, Agua Tibia Mountains, El Cariso, and east of State Street south of Hemet would be within the area subject to take authorization. Approximately 2,950 acres (26%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. However, approximately 2,290 acres of the within the area subject to take authorization. Acres would be subject to focused surveys for slender-horned spine flower. Newly identified populations would be conserved in accordance with the Narrow Endemics policy. The policy related to riparian, riverine, and vernal pool areas would also apply. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 3,400 acres (30%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 3,600 acres (32%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Existing Reserves. Known localities at Gavilan Plateau, north of Meadowbrook, Temescal Canyon, Lake Elsinore, Valle Vista, Agua Tibia Mountains, El Cariso, east of State Street south of Hemet, Bautista Canyon, upper San Jacinto River, Alberhill, Alberhill Creek east of Lake Elsinore, Railroad Canyon, Vail Lake, and Kolb Creek would be within the area subject to take authorization. Approximately 7,580 acres (67%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.
Santa Ana River woollystar – Eriastrum densifolium ssp. Sanctorum MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 910 acres (28%) of primary habitat, including Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 1,180 acres (36%) of primary habitat, including Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,170 acres (67%) of primary habitat in the Plan Area, including Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.
San Diego button-celery – Eryngium aristulatum var. parishii MSHCP Project. No known localities would be within the area subject to take authorization. Although no take of known occurrences would occur as part of the MSHCP, certain areas located outside the MSHCP Conservation Area may contain vernal pool habitat that could support this species. Precision is lacking within the vegetation mapping of the MSHCP database and, therefore, the precise level of impact cannot be quantified at this time. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project.
Parish's meadowfoam – Limnanthes gracilis var. parishii MSHCP Project. No known occurrences would be within the area subject to take authorization. Suitable habitat for this species is present outside the MSHCP Conservation Area in ephemeral wetlands and mima mounds in forest glades and mountain areas. The precise quantification of impact to this section in these areas outside the MSHCP Conservation Area cannot be determined at this time. Listed, Proposed, and Strong Candidate. Same as MSHCP Project. Listed and Proposed. Same as MSHCP Project. Existing Reserves. Same as MSHCP Project.
spreading navarretia – Navarretia fossalis MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 1,370 acres (17%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. This is a species on the Narrow Endemic Plant List (Section 6.1.3). Surveys for spreading navarretia will be conducted as part of the project review process for public and private projects within the Narrow Endemic Plant Species survey area where suitable habitat is present (see Narrow Endemic Plant Species Survey Area Map, Figure 6-1 of the MSHCP, Volume I). Spreading navarretia located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.1.3, MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Existing Reserves. Localities at Skunk Hollow and the San Jacinto River would be within the area subject to take authorization. Approximately 5,360 acres (65%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.
California Orcutt grass – Orcuttia californica MSHCP Project. One of five localities (west of the Santa Rosa Plateau) would be within the area subject to take authorization. Approximately 1,130 acres (14%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Approximately 940 acres (12%) of the affected habitat would be subject to focused surveys. Newly identified populations would be conserved in accordance with the Narrow Endemics policy described within Section 6.1.3. MSHCP, Volume I. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,000 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,000 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Existing Reserves. Three of five localities (west of the Santa Rosa Plateau, at Skunk Hollow, and upper Salt Creek west of Hemet) would be within the area subject to take authorization. Approximately 4,940 acres (63%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.

Table 4B - Comparison of Effects on Listed Covered Species by Alternative

INVERTEBRATES/CRUSTACEANS

vernal pool fairy shrimp – Branchinecta lynchi

MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 4,016 acres (60%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Vernal pool areas not included as part of the MSHCP Conservation Area would be subject to policies related to riparian/riverine and vernal pool habitats presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to vernal pools shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. One of the three known locations, upper Salt Creek, would be within the area subject to take authorization. Approximately 6,490 acres (90%) of suitable habitat including vernal pool habitat would be within the area subject to take authorization.

Riverside fairy shrimp – Streptocephalus woottoni

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 5,868 acres (33%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Wetland areas not included as part of the MSHCP Conservation Area would be subject to policies related to riparian/riverine and vernal pool habitats presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to vernal pools shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities in the back basin of Lake Elsinore would be within the area subject to take authorization. Approximately 6,765 acres (40%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization.

Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Murrieta, Alberhill, and the back basin of Lake Elsinore. Approximately 9,690 acres (54%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization.

INVERTEBRATES/INSECTS

Quino checkerspot butterfly – Euphydryas editha quino

MSHCP Project. Approximately 41,668 acres (38%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Wilson Creek, Tule Peak, Silverado, Oak Mountain, Warm Springs Creek, and Sage would be within the area subject to take authorization. Approximately 46,460 acres (43%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization.

Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative, except approximately 49,640 acres (45%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would not be conserved include Tule Valley, Aguanga, Vail Lake, Paloma Valley, Murrieta Hot Springs, Sage, Wilson Valley, Murrieta, Temecula, Oak Mountain, and Warm Springs Creek. Approximately 82,509 acres (75%) of suitable habitat including chaparral, coastal sage scrub, grasslands, playas and vernal pools, and woodlands and forests would be within the area subject to take authorization.

Delhi Sands flower-loving fly – Rhaphiomidas terminatus abdominalis

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 452 acres (90%) of suitable habitat including coastal sage scrub, Riversidean alluvial fan sage scrub, and grasslands co-occurring with Delhi soils would be within the area subject to take authorization. Approximately 791 acres (82%) of restorable habitat including agricultural lands cooccurring with Delhi soils would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Jurupa and Agua Mansa. Approximately 465 acres (93%) of suitable habitat including coastal sage scrub, Riversidean alluvial fan sage scrub, and grasslands cooccurring with Delhi soils would be within the area subject to take authorization. Approximately 830 acres (86%) of restorable habitat including agricultural lands cooccurring with Delhi soils would be within the area subject to take authorization.

Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Mira Loma, Agua Mansa, and Jurupa. Approximately 479 acres (95%) of suitable habitat including coastal sage scrub, Riversidean alluvial fan sage scrub, and grasslands co-occurring with Delhi soils would be within the area subject to take authorization. Approximately 957 acres (99%) of restorable habitat including agricultural lands co-occurring with Delhi soils would be within the area subject to take authorization.

FISH

Santa Ana sucker – Catastomus santaanae

MSHCP Project. None of the core population areas, spawning areas, dispersal, or refuge areas would be within the area subject to take authorization. Approximately 540 acres (6%) of suitable habitat that includes water habitat would be within the area subject to take authorization. Riverine areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project.

AMPHIBIANS

arroyo toad – Bufo californicus

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 296 acres (16%) of suitable breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Approximately 2,320 acres (25%) of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitats. Localities that would be within the area subject to take authorization. include Bautista Creek, San Juan Creek, Arroyo Seco, Temecula Creek, and Tenaja Creek. Approximately 415 acres (22%) of breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Approximately 2,510 acres of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization.

Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative except approximately 435 acres (23%) of breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Approximately 2,605 (28%) acres of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization.

Existing Reserves. Localities that would be affected include Vail Lake, San Jacinto River, Indian Creek, San Juan Creek, Arroyo Seco, Temecula Creek, Wilson Creek, Tenaja Creek, and Bautista Creek. Approximately 415 acres (22%) of breeding habitat including meadows and marshes, riparian scrub, woodland and forest, and Riversidean alluvial fan sage scrub be within the area subject to take authorization. Approximately 2,510 acres of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization.

California red-legged frog – Rana aurora draytonii

MSHCP Project. Approximately 47 acres (6%) of suitable habitat including playas and vernal pools riparian scrub, Riversidean alluvial fan sage scrub, and open water would be within the area subject to take authorization. Approximately 9,370 acres (19%) of suitable upland habitat including agricultural lands, chaparral, coastal sage scrub, grasslands, and woodlands and forests would be within the area subject to take authorization. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project.

mountain yellow-legged frog – Rana mucosa

MSHCP Project. Individuals occurring outside the MSHCP Conservation Area would bewithin the area subject to take authorization. Approximately 140 acres (29%) of primaryhabitat including riparian scrub and woodlands and forests occurring above 1,200 feet inthe San Jacinto Mountains would be within the area subject to take authorization.Approximately 11,460 acres (26%) of secondary habitats including montane coniferousforests and woodlands and forests occurring above 1,200 feet in the San JacintoMountains would be within the area subject to take authorization. Riparian areas notincluded as part of the MSHCP Conservation Area would be subject to the policiesrelated to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of theMSHCP, Volume I, and impacts to riparian areas shall be avoided and minimization inaccordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project.

REPTILES

southern rubber boa – Charina bottae umbratica

MSHCP Project. Incidental take of the southern rubber boa is difficult to quantify due to limited knowledge of the species distribution within the Plan Area, and the fact that losses may be masked by fluctuations in abundance and distribution during the life of the permit. However, the maximum level of take of the southern rubber boa can be anticipated by the loss of habitat for this species. Approximately 155 acres (5%) of primary habitat, including chaparral, grassland, montane coniferous forest, riparian scrub, woodland and forest, and non-riparian woodland and forest, would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project.

BIRDS

Swainson's hawk – Buteo swainsoni

MSHCP Project. Localities at Winchester would be within the area subject to take authorization. Approximately 257,220 acres (57%) of suitable habitat including agriculture field crop lands, grassland, desert scrub, Riversidean alluvial fan sage scrub, coastal sage scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Winchester would be within the area subject to take authorization. Approximately 270,203 acres (68%) of suitable habitat including agriculture field crop lands, grassland, desert scrub, Riversidean alluvial fan sage scrub, coastal sage scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Winchester, Badlands, and Temecula Creek would be within the area subject to take authorization. Approximately 280,545 acres (70%) of suitable habitat including agriculture field crop lands, grassland, desert scrub, Riversidean alluvial fan sage scrub, coastal sage scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Sedco Hills, Temecula Creek, Vail Lake, Wilson Valley, Motte-Rimrock Badlands, Lakeview Mountains, Sage, Wildomar, and Winchester. Approximately 335,770 acres (84%) of suitable habitat, including agriculture field crop lands, grassland, cismontane alkali marsh, playas and vernal pools, Riversidean alluvial fan sage scrub, coastal sage scrub, peninsular juniper woodland and scrub, and riparian scrub, and woodland and forest within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

mountain plover (wintering) – Charadrius montanus

MSHCP Project. Localities that would be affected include Winchester and Double Butte. Approximately 1,160 acres (15%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,053 acres (26%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Localities that would be affected include Winchester, Double Butte, and Lakeview Mountains. Approximately 2,053 acres (26%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Localities that would be affected include Winchester, Double Butte, Lakeview Mountains, upper Salt Creek/San Jacinto Valley, and Menifee/Perris/Nueveo/Mystic Lake. Approximately 4,980 acres (63%) of suitable habitat including playas and vernal pools within the Riverside Lowlands would be within the area subject to take authorization.

western yellow-billed cuckoo – Coccyzus americanus occidentalis

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 2,580 acres (22%) of suitable habitat including southern cottonwood/willow riparian, southern sycamore/alder riparian, riparian scrub, riparian forest, and southern willow scrub within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Surveys for western yellow-billed cuckoo will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. Western yellow-billed cuckoo located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 6.1.2 of the MSHCP, Volume I. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 5,730 acres (49%) of suitable habitat including southern cottonwood/willow riparian, southern sycamore/alder riparian, riparian scrub, riparian forest, and southern willow scrub within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

southwestern willow flycatcher – Empidonax traillii extimus

MSHCP Project. A total of 5 of 17 localities would be within the area subject to take authorization; however, the localities are located outside suitable habitat areas within existing residential/urban/exotic areas, non-native grassland, or open water. Approximately 3,220 acres (23%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be affected throughout the MSHCP Area. Surveys for southwestern willow flycatcher will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. Southwestern willow flycatcher located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 6.1.2 of the MSHCP, Volume I. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to wetland shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Potrero Creek and Santa Margarita River would be within the area subject to take authorization. Approximately 4,735 acres (34%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Potrero Creek, Santa Margarita River, and Temecula Creek would be within the area subject to take authorization. Approximately 4,990 acres (36%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Potrero Creek, Temecula Creek, Vail Lake, Temescal Wash, Alberhill Creek, Murrieta Creek, Santa Margarita River, and Bautista Creek would be within the area subject to take authorization. Approximately 6,610 acres (48%) of suitable habitat including riparian scrub, excluding tamarisk scrub and mule fat scrub, would be within the area subject to take authorization.

peregrine falcon – Falco peregrinus

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. However, no impacts to raptor nests would occur. Approximately 2,140 acres (12%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization. Riparian and riverine areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian and riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,387 acres (13%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,475 acres (14%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 3,330 acres (19%) of suitable habitat including open water and riparian habitat within the Prado Basin and Santa Ana River would be within the area subject to take authorization.

bald eagle – Haliaeetus leucocephalus

MSHCP Project. Two localities at Lake Riverside and Lake Hemet would be within the area subject to take authorization. Approximately 2,140 acres (12%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization. Riparian and riverine areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian and riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,390 acres (13%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,475 acres (14%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Three localities at Lake Riverside, Lake Hemet, and Vail Lake would be within the area subject to take authorization. Approximately 3,840 acres (21%) of suitable habitat including riparian habitat in the Prado Basin/Santa Ana River and open water habitat would be within the area subject to take authorization.

coastal California gnatcatcher – Polioptila californica californica

MSHCP Project. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road. Approximately 63,700 acres (45%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road, and El Sobrante Landfill. Approximately 70,980 acres (50%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road, and El Sobrante Landfill. Approximately 78,450 acres (56%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Localities that would be within the area subject to take authorization include Norco Hills, Alessandro Hills, Quail Valley, and Rancho California east of I-15 to De Portola Road, El Sobrante Landfill, Alberhill, North Peak Conservation Bank, Gavilan Plateau, Canyon Lake, and Sedco Hills. Approximately 112,260 acres (80%) of suitable habitat including desert scrub, Riversidean alluvial fan sage scrub, and coastal sage scrub would be within the area subject to take authorization.

least Bell's vireo – Vireo bellii pusillus

MSHCP Project. Localities at Mockingbird Canyon would be within the area subject to take authorization. Approximately 2,780 acres (23%) of suitable habitat including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization. Surveys for least Bell's vireo will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. Least Bell's vireos located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 of the MSHCP, Volume I. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policies related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Mockingbird Canyon, Potrero Creek, and Tucalota Creek would be within the area subject to take authorization. Approximately 4,087 acres (33%) of suitable habitat, including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Mockingbird Canyon, Temecula Creek, Potrero Creek, and Tucalota Creek would be within the area subject to take authorization. Approximately 4,309 acres (35%) of suitable habitat, including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Mockingbird Canyon, Temecula Creek, Murrieta Creek, Temescal Wash, Vail Lake, Wilson Valley, San Timoteo Creek, Potrero Creek, Alberhill Creek, and Tucalota Creek would be within the area subject to take authorization. Approximately 6,350 acres (52%) of suitable habitat, including riparian scrub, woodlands and forests within the Riverside Lowlands and San Jacinto Foothills bioregions would be within the area subject to take authorization.

MAMMALS

San Bernardino kangaroo rat – Dipodomys merriami parvus

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. Approximately 1,785 acres (32%) of suitable habitat including coastal sage scrub and Riversidean alluvial fan sage scrub would be within the area subject to take authorization. Surveys for San Bernardino kangaroo rat will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present. San Bernardino kangaroo rats located as a result of survey efforts shall be conserved in accordance with the procedures described within Section 6.3.2 of the MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at Bautista Creek and San Jacinto River would be within the area subject to take authorization. Approximately 4,357 acres (79%) of suitable habitat, including coastal sage scrub and Riversidean alluvial fan sage scrub would be within the area subject to take authorization.

Stephens' kangaroo rat – Dipodomys stephensi

MSHCP Project. Localities at March Air Reserve Base (ARB), east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, and Double Butte would be within the area subject to take authorization. Approximately 11,850 acres (34%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at March ARB, east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, Cactus Valley, Badlands, Double Butte, and Warm Springs Creek would be within the area subject to take authorization. Approximately 11,850 acres (34%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at March ARB, east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, Cactus Valley, Badlands, Potrero Valley, Double Butte, Warm Springs Creek, Tule Valley, Badlands, Reche Canyon, and Lakeview Mountains would be within the area subject to take authorization. Approximately 14,350 acres (41%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities at March ARB, east Riverside (e.g., Alessandro Hills), Moreno Valley, Woodcrest, Meade Valley, Perris, Sun City, Norco Hills, Wildomar, Menifee, Murrieta, Temecula, Hemet, San Jacinto, Banning/Beaumont, Cactus Valley, Badlands, Double Butte, Warm Springs Creek, Tule Valley, Badlands, Reche Canyon, Lakeview Mountains, Silverado Ranch, Motte-Rimrock, Wilson Valley, Potrero Valley, Aguanga, Bautista Creek, North Peak, Sedco Hills, Gavilan Hills/Plateau, and Sage/Wilson area would be within the area subject to take authorization. Approximately 20,390 acres (59%) of suitable habitat including coastal sage scrub, desert scrub, grassland, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization.

PLANTS

Munz's onion – Allium munzii

MSHCP Project. Two of the 15 known localities located northeast of Alberhill and on privately-owned land would be within the area subject to take authorization. Approximately 15,825 acres (42%) of primary habitat in the Plan Area, including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands, would be within the area subject to take authorization. This is a species on the Narrow Endemics Plant list (Section 6.1.3). Surveys will be conducted as part of the project review process for public and private projects within the Narrow Endemic Plant Species survey area where suitable habitat is present (see Narrow Endemic Plant Species Survey Area Map, Figure 6-1 of the MSHCP, Volume I). Munz's onions located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.1.3, MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 17,430 acres (47%) of primary habitat in the Plan Area, including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 18,670 acres (50%) of primary habitat in the Plan Area, including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands, would be within the area subject to take authorization.

Existing Reserves. Six of the 15 known localities located at Alberhill, De Palma Road, Bachelor Mountain, North Peak, northeast of Alberhill, and on privately owned land would be within the area subject to take authorization. Approximately 26,125 acres (70%) of primary habitat for Munz's onion in the Plan Area including chaparral, coastal sage scrub, grassland, peninsular juniper, and woodlands would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved, and surveys would not be required.

San Diego ambrosia – Ambrosia pumila

MSHCP Project. One of the three known extant localities (east of Lake Street in the City of Elsinore) would be within the area subject to take authorization. Approximately 52,010 (70%) acres of primary habitat in the Plan Area, including grassland and playas and vernal pools, would be within the area subject to take authorization; however, 8,940 acres of this 52,010 acres would be subject to focused surveys for San Diego ambrosia. Newly identified populations would be conserved in accordance with the Narrow Endemics policy described within Section 6.1.3. MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 55,100 (75%) acres of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization.

Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. All three of the known extant localities at Skunk Hollow, Alberhill Creek at Nichols Road, and east of Lake Street in the City of Elsinore would be within the area subject to take authorization. Approximately 62,940 (85%) acres of primary habitat in the Plan Area, including grassland and playas and vernal pools, would be within the area subject to take authorization.

San Jacinto Valley crownscale – Atriplex coronata var. notatior

MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 1,370 acres (17%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys for San Jacinto Valley crownscale will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). San Jacinto Valley crownscale located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization.

Existing Reserves. Localities at the San Jacinto River and Alberhill Creek near Lake Elsinore would be within the area subject to take authorization. Approximately 5,360 acres (65%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.

Nevin's barberry – Berberis nevinii

MSHCP Project. Three of the 52 known localities (in the City of Riverside, Aguanga, and Temecula) would be within the area subject to take authorization. Approximately 3,990 acres (33%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys for Nevin's barberry will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). Nevin's barberry located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Four of the 52 known localities (in the City of Riverside, Aguanga, Temecula, and Jurupa Hills) would be within the area subject to take authorization. Approximately 4,620 acres (39%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Five of the 52 known localities (in the City of Riverside, Aguanga, Temecula, Jurupa Hills, and Badlands) would be within the area subject to take authorization. Approximately 4,920 acres (41%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Existing Reserves. Localities in the City of Riverside, Aguanga, Temecula, Jurupa Hills, San Timoteo/Badlands area, and Vail Lake would be within the area subject to take authorization. Approximately 9,730 acres (81%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.

thread-leaved brodiaea – Brodiaea filifolia

MSHCP Project. Nine of the 30 occurrences would be within the area subject to take authorization. Approximately 1,370 acres (17%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). Thread-leaved brodiaea located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I.

Existing Reserves. Twenty-two of the 30 occurrences (west of the Santa Rosa Plateau, associated with the vernal pools west of Hemet [upper Salt Creek] and associated with the San Jacinto River) would be within the area subject to take authorization. Approximately 5,360 acres (65%) of primary habitat, including grassland and playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.

Vail Lake ceanothus – Ceanothus ophiochilus

MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 3,350 acres (20%) of primary habitat, including chaparral, would be within the area subject to take authorization. This is a species on the Additional Survey Needs and Procedures (Section 6.3.2). Surveys will be conducted as part of the project review process for public and private projects within the Criteria Area where suitable habitat is present (see Criteria Area Species Survey Area Map, Figure 6-2 of the MSHCP, Volume I). Vail Lake ceanothus located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.3.2, MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 3,870 acres (23%) of primary habitat, including chaparral, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 4,130 acres (25%) of primary habitat, including chaparral, would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and primary habitat. Localities at Vail Lake would be within the area subject to take authorization. Approximately 7,720 acres (46%) of primary habitat, including chaparral, would be within the area subject to take authorization.

Mojave tarplant – Deinandra mohavensis (formerly known as Hemizonia mohavensis)

MSHCP Project. Two of eight occurrences, including along the Banning Idyllwild Panoramic Highway and within the San Jacinto Mountains would be within the area subject to take authorization. Approximately 27,850 acres (26%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 32,200 acres (30%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 34,300 acres (32%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization.

Existing Reserves. Five of eight occurrences, including along the Banning Idyllwild Panoramic Highway, within the San Jacinto Mountains, and near the San Jacinto River east of Hemet, would be within the area subject to take authorization. Approximately 35,000 acres (32%) of primary habitat, including chaparral, and riparian scrub, woodland and forest, would be within the area subject to take authorization.

slender-horned spine flower – Dodecahema leptoceras

MSHCP Project. Of the 27 University of California at Riverside (UCR) database and herbarium records, 12 of the occurrences at Gavilan Plateau, north of Meadowbrook, Temescal Canyon, Lake Elsinore, Valle Vista, Agua Tibia Mountains, El Cariso, and east of State Street south of Hemet would be within the area subject to take authorization. Approximately 2,950 acres (26%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. However, approximately 2,290 acres of the within the area subject to take authorization. Acres would be subject to focused surveys for slender-horned spine flower. Newly identified populations would be conserved in accordance with the Narrow Endemics policy. The policy related to riparian, riverine, and vernal pool areas would also apply.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 3,400 acres (30%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 3,600 acres (32%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Existing Reserves. Known localities at Gavilan Plateau, north of Meadowbrook, Temescal Canyon, Lake Elsinore, Valle Vista, Agua Tibia Mountains, El Cariso, east of State Street south of Hemet, Bautista Canyon, upper San Jacinto River, Alberhill, Alberhill Creek east of Lake Elsinore, Railroad Canyon, Vail Lake, and Kolb Creek would be within the area subject to take authorization. Approximately 7,580 acres (67%) of primary habitat, including chaparral and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.

Santa Ana River woollystar – Eriastrum densifolium ssp. Sanctorum

MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 910 acres (28%) of primary habitat, including Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 1,180 acres (36%) of primary habitat, including Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,170 acres (67%) of primary habitat in the Plan Area, including Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

San Diego button-celery – Eryngium aristulatum var. parishii

MSHCP Project. No known localities would be within the area subject to take authorization. Although no take of known occurrences would occur as part of the MSHCP, certain areas located outside the MSHCP Conservation Area may contain vernal pool habitat that could support this species. Precision is lacking within the vegetation mapping of the MSHCP database and, therefore, the precise level of impact cannot be quantified at this time.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project.

Parish's meadowfoam – Limnanthes gracilis var. parishii

MSHCP Project. No known occurrences would be within the area subject to take authorization. Suitable habitat for this species is present outside the MSHCP Conservation Area in ephemeral wetlands and mima mounds in forest glades and mountain areas. The precise quantification of impact to this section in these areas outside the MSHCP Conservation Area cannot be determined at this time.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project.

Listed and Proposed. Same as MSHCP Project.

Existing Reserves. Same as MSHCP Project.

spreading navarretia – Navarretia fossalis

MSHCP Project. No known localities would be within the area subject to take authorization. Approximately 1,370 acres (17%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. This is a species on the Narrow Endemic Plant List (Section 6.1.3). Surveys for spreading navarretia will be conducted as part of the project review process for public and private projects within the Narrow Endemic Plant Species survey area where suitable habitat is present (see Narrow Endemic Plant Species Survey Area Map, Figure 6-1 of the MSHCP, Volume I). Spreading navarretia located as a result of survey efforts shall be conserved in accordance with procedures described within Section 6.1.3, MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,115 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization.

Existing Reserves. Localities at Skunk Hollow and the San Jacinto River would be within the area subject to take authorization. Approximately 5,360 acres (65%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.

California Orcutt grass – Orcuttia californica

MSHCP Project. One of five localities (west of the Santa Rosa Plateau) would be within the area subject to take authorization. Approximately 1,130 acres (14%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Approximately 940 acres (12%) of the affected habitat would be subject to focused surveys. Newly identified populations would be conserved in accordance with the Narrow Endemics policy described within Section 6.1.3. MSHCP, Volume I.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,000 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 2,000 acres (26%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization.

Existing Reserves. Three of five localities (west of the Santa Rosa Plateau, at Skunk Hollow, and upper Salt Creek west of Hemet) would be within the area subject to take authorization. Approximately 4,940 acres (63%) of primary habitat, including playas and vernal pools, would be within the area subject to take authorization. Based on the October 2000 Alternatives Development Document, this species would not be conserved.

Source: October 2000 MSHCP Alternatives Development Document.

Features have been incorporated in the MSHCP to minimize impacts to Listed Covered Species to the extent feasible. These include assembly of an MSHCP Conservation Area that incorporates substantial acreages of suitable habitat and known locations in a configuration that provides live-in and linkage habitat for a number of species. For example, core populations of coastal California gnatcatcher at Alberhill, North Peak, Kabian Park, and Ramsgate would be conserved, as well as linkages, such as the Sedco Hills and Gavilan Plateau, to other localities in the MSHCP Area. Criteria-based Reserve Assembly would occur in a manner consistent with Rough Step policies and the Habitat Evaluation and Acquisition Negotiation Strategy, and other implementation strategies as described in Section 6.1.1, MSHCP, Volume I.

In addition, the proposed MSHCP includes policies that would afford additional protection to some Listed Covered Species occurring outside of the MSHCP Conservation Area. The narrow endemics plant species policy and the additional survey needs policy, described in Section 6.1.3 and 6.3.2, respectively, of the MSHCP, Volume I, require surveys to be conducted as part of the project review process for public and private projects where suitable habitat is present. The following Listed Covered Species are subject to the narrow endemic plant species and additional survey needs policies.

Narrow Endemic Plant Species Policy

Munz's onion
San Diego ambrosia
San Jacinto Valley crownscale
Nevin's barberry
thread-leaved brodiaea

Vail Lake ceanothus
slender-horned spine flower
spreading navarretia
California Orcutt grass

Additional Survey Needs Policy

western yellow-billed cuckoo
southwestern willow flycatcher

least Bell's vireo
San Bernardino kangaroo rat

Species detected during surveys would be conserved in accordance with the respective applicable policy. Information gathered as a result of species surveys would serve to fill data gaps and inform monitoring and management for a species. The additional survey requirements and information gathering efforts would be implemented until the MSHCP Conservation Area is assembled in a manner that is consistent with the conservation objectives for individual species.

Wetland species occurring outside of the MSHCP Conservation Area may also receive additional protection as a result of implementation of the policy related to riparian, riverine, and vernal pool areas described in Section 6.1.2 of the MSHCP, Volume I. As part of this policy, survey, mapping, and documentation of riparian, riverine, vernal pool systems, and other areas that are identified as jurisdictional under Section 1600 et seq. of the California Fish and Game Code or Sections 401, 402, or 404 of the Federal Clean Water Act would occur. These areas may include playas and vernal pools, open water, meadows and marshes, riparian scrub, woodlands and forests, and other habitat types, known to occur in the Plan Area. For areas containing riparian, riverine, or vernal pool features that are located outside of the MSHCP Conservation Area, avoidance and minimization measures, as required as mitigation through the CEQA process or State/federal regulatory processes, would be employed. The avoidance and minimization measures would reduce impacts to wetland habitats supporting Listed Covered Species. The following Listed Covered Species would benefit from implementation of the wetland policy.

Listed Covered Wetland Species

vernal pool fairy shrimp
Riverside fairy shrimp
Santa Ana sucker
arroyo toad
California red-legged frog
mountain yellow-legged frog
western yellow-billed cuckoo
southwestern willow flycatcher

peregrine falcon
bald eagle
least Bell's vireo
California Orcutt grass
San Jacinto Valley crownscale
thread-leaved brodiaea
San Diego button-celery
spreading navarretia

If suitable habitat were determined to be present, focused surveys for the following Listed Covered Species would be conducted: least Bell's vireo, southwestern willow flycatcher, western yellow-billed cuckoo, vernal pool fairy shrimp, and Riverside fairy shrimp. Localities of wetland species observed during focused surveys would be conserved in accordance with the process of wetland conservation identified in Section 6.1.2 of the MSHCP.

Additional covered activities inside the Criteria Area that are considered to be allowable uses within the MSHCP Conservation Area but have not been included in the quantification of impacts contained in Table 4A are the allowances for development of single-family homes on existing legal parcels within the Criteria Area and the possible allowance of agricultural conversion on lands within the Criteria Area up to a maximum of 10,000 acres.

Development of individual single-family homes on existing legal parcels (hereinafter referred to as the “Single-Family Home Expedite Process”), in accordance with existing land use regulations, is a covered activity within the Criteria Area. An expedited review process, through the Property Owner Initiated Habitat Evaluation and Acquisition Negotiation Process has been developed as part of the MSHCP to assist in determining the appropriate location of a single-family home or mobile home on an existing legal lot within the Criteria Area.

If during the review period it is determined that all or part of the property may benefit the assembly of the MSHCP Conservation Area, the Permittee may negotiate with the property owner to acquire the entire lot or portion thereof or determine which incentives may apply in order to acquire a conservation easement over that portion of the property that is not necessary for access road(s) and outside of the building footprint area. If the Permittee is unable to reach agreement with the property owner concerning the acquisition of the entire lot or a conservation easement over a portion of the lot upon completion of the review period, the property owner may proceed with the processing of the grading or site preparation permit application. However, compliance with the location of the building footprint area as well as the location of any necessary road(s) will be required.

Trend data collected from 1995 to mid 2002 suggests that, on average, there is development of approximately 75 single-family homes on lots averaging approximately 9 acres in size within the Criteria Area on an annual basis. Therefore, the Single-Family Home Expedite Process will have the potential to affect approximately 675 acres of land within the Criteria Area annually. For the purpose of this analysis, it is assumed that approximately 50 percent of that area, or 338 acres, potentially within the area subject to take authorization by such development will be within areas of sensitive habitat that are considered desirable for inclusion in the Reserve. This is based on the overall ratio of Additional Reserve Lands to Criteria Area, which is roughly one half. Based on the trend data and average parcel size, that 338 acres represents approximately 38 parcels. It is estimated that the Permittees will be able to successfully negotiate with 75 percent, or 29 of the 38 property owners through the Property Owner Initiated Habitat Evaluation and Acquisition Negotiation Process. Therefore, it is assumed that conservation that conforms to the Criteria will be achieved on approximately 253 of the 338 acres of land per year that is potentially within the area subject to take authorization through this process. It is assumed that the remaining approximately 85 acres will not be developed in accordance with the Criteria and will become unavailable for conservation on an annual basis, as a result of the Single-Family Home Expedite Process.

The inability to incorporate into the Reserve approximately 85 acres of land that is desirable for conservation throughout the Plan Area on an annual basis will not reduce the overall acreage required for Additional Reserve Lands. So while conservation may be precluded on an estimated average of 85 acres per year, it is not expected that this will adversely affect the ability to assemble a viable MSHCP Conservation Area, since there is adequate additional land within the Criteria Area that could be acquired in lieu of the areas subject to development under the Single-Family Home Expedite Process.

In addition, annual reporting will determine whether the activity of single-family home development occurs in a manner that is consistent with the assumptions used for the MSHCP analysis. The number of grading or site preparation permits for the construction or location of a single-family home or a mobile home on an existing legal lot located within the Criteria Area will be monitored and reported on at least an annual basis in order to insure that appropriate assembly of the MSHCP Conservation Area is occurring. Therefore, no significant impacts on Covered Species will result from the construction or location or single-family or mobile homes on existing legal lots within the Criteria Area.

If Section 6.3 of the MSHCP is implemented, conversion of natural lands to agricultural use, as defined and outlined in that section of the MSHCP, will be allowed as a covered activity within the Criteria Area, up to an established threshold of 10,000 acres over the life of the plan ( the “New Agricultural Lands Cap”). Agricultural Operations, as defined in Section 6.3 of the MSHCP, include all uses conducted as a normal part of such operations, provided such actions are in compliance with all applicable laws and regulations.

To verify the location of the existing Agricultural Operations, the County will establish a database identifying existing Agricultural Operations (“Existing Agricultural Operations Database”) on or before the effective date of the Implementing Agreement or the issuance of the Section 10(a) Permit and the NCCP Authorization. The new Agricultural Lands Cap of 10,000 acres within the Criteria Area will be applied to Agricultural Operations that are in addition to the activities recorded in the Existing Agricultural Operations Database. The 10,000-acre New Agricultural Lands Cap represents approximately 3 percent of the total acreage that is contained within the Criteria Area.

To estimate the potential effects of New Agricultural Lands in relation to the MSHCP, it is assumed that approximately 50 percent of the agricultural conversions that take place within the Criteria Area will be consistent with the Criteria. Therefore, it is assumed that approximately 5,000 acres of New Agricultural Lands will occur within areas considered desirable for conservation under the Criteria. This represents approximately 1.5 percent of the total Additional Reserve Lands proposed to be acquired within the Criteria Area. Tracking of MSHCP implementation, and adjustments to Reserve Assembly strategies as outlined in this section, will provide a mechanism to ensure that adequate acreage of Additional Reserve Lands is being acquired, and that appropriate reserve design and configuration are being achieved. Therefore, no significant biological impacts to Listed Covered Species are anticipated to result from New Agricultural Lands Cap.

With the combination of impact reduction features incorporated into the Proposed Project, including reserve configuration, adaptive management and monitoring, and species survey and avoidance/minimization policies, the Project's impacts to Listed Covered Species would be less than significant.

Non-Listed Covered Species. The Non-Listed Covered Species include 65 of the 83 covered wildlife species and 52 of 63 plant species. The impacts to the 115 Non-Listed Covered Species are quantified based on the best existing information available for known occurrences and potential suitable habitat for each Non-Listed Covered Species (Table 4C). These impacts vary depending on the species. For example, as shown on Table 4C, implementation of the proposed take authorization would result in take authorization for 75 percent of suitable habitat for the burrowing owl. For Santa Rosa Plateau pool fairy shrimp, approximately 15 percent of suitable habitat occurring outside of the MSHCP Conservation Area would be within the area subject to take authorization. For certain Non-Listed Covered Species, such as arroyo chub and San Bernardino flying

Table 4C - Comparison of Effects on Non-Listed Covered Species by Alternative
INVERTEBRATES/CRUSTACEANS
Santa Rosa Plateau fairy shrimp – Linderiella santarosae MSHCP Project. No known localities of this species would be impacted. Approximately 1,159 acres (15%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Wetland areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to vernal pools shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,053 acres (26%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 4,987 acres (63%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization.
FISH
arroyo chub – Gila orcutti MSHCP Project. No known breeding or occupied locality would be within the area subject to take authorization. Approximately 1,870 acres (15%) of suitable habitat including water habitats would be within the area subject to take authorization. Riverine areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. The locality that would be within the area subject to take authorization. is the Santa Margarita River. Approximately 2,115 acres (17%) of suitable habitat including water habitats would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Santa Margarita River and Murrieta Creek near its confluence with the Santa Margarita River and Temecula Creek. Approximately 2,205 acres (18%) of suitable habitat including water habitats would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Santa Margarita River and Murrieta Creek near its confluence with the Santa Margarita River and Temecula Creek. Approximately 3,060 acres (25%) of suitable habitat including water habitats would be within the area subject to take authorization.
AMPHIBIANS
western spadefoot – Scaphiopus hammondii MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be subject to take authorization. Approximately 1,162 acres (15%) of primary habitat including playas and vernal pools occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Approximately 348,923 acres (51%) of secondary habitat including chaparral, coastal sage scrub, grassland, and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be within the area subject to take authorization include Banning, Badlands, area south of Hemet, Anza/Sage/Wilson Valley, Moreno Valley, Beaumont, Canyon Lake, Corona, Murrieta, Murrieta Hot Springs, El Cerrito, and March Air Reserve Base (ARB). Approximately 2,053 acres (26%) of primary habitat including playas and vernal pools occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Approximately 348,923 acres (51%) of secondary habitat including chaparral, coastal sage scrub, grassland, and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be within the area subject to take authorization include Banning, Badlands, area south of Hemet, Anza/Sage/Wilson Valley, Moreno Valley, Beaumont, Canyon Lake, Corona, Murrieta, Murrieta Hot Springs, El Cerrito, and March ARB. Approximately 2,053 acres (26%) of primary habitat including playas and vernal pools occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Approximately 370,193 acres (53%) of secondary habitat including chaparral, coastal sage scrub, grassland and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Lee Lake/Alberhill/Elsinore, Antelope Valley, Good Hope, Badlands, Tule Valley, Banning, Badlands, area south of Hemet, Anza/Sage/Wilson Valley, Moreno Valley, Beaumont, Canyon Lake, Corona, Murrieta, Murrieta Hot Springs, El Cerrito, Hogbacks, Sedco Hills, Temescal Wash, Bautista Creek, and March ARB. Approximately 4,897 acres (63%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Approximately 449,328 acres (65%) of secondary habitat including chaparral, coastal sage scrub, grassland, and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization.
coast range newt – Taricha tarosa tarosa MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be subject to take authorization. Approximately 4,010 acres (32%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water within the Santa Ana Mountains bioregion would be in areas subject to take authorization. Approximately 32,069 acres (30%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization within the Santa Ana Mountains bioregion. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary and secondary habitats. Approximately 4,632 acres (37%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water within the Santa Ana Mountains bioregion would be in the area subject to take authorization. Approximately 32,069 acres (30%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary and secondary habitats. Approximately 4,536 acres (36%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water would be within the area subject to take authorization. Approximately 32,069 acres (30%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary and secondary habitats. Approximately 5,152 acres (41%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water would be affected within the Santa Ana Mountains bioregion. Approximately 36,760 acres (34%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub, would be affected within the Santa Ana Mountains bioregion.
REPTILES
western pond turtle – Clemmys marmorata pallida MSHCP Project. The incidental take of the western pond turtle is difficult to quantify due to limited knowledge of its distribution and abundance within the Plan Area. The maximum level of incidental take of western pond turtle can be anticipated by the loss of habitat. Individuals outside the MSHCP Conservation Area would be subject to take authorization. Approximately 5,331 acres (22%) of primary wetland habitat for western pond turtle in the Plan Area would be within the area subject to take authorization. This includes meadows, marsh, riparian scrub, woodland and forest, and open water and 34,068 acres (36%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest. Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 7,200 acres (30%) of primary wetland habitat, including meadows, marsh, riparian scrub, woodland and forest, and open water and 37,300 acres (40%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest, would be within the area subject to take authorization. Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 7,500 acres (32%) of primary wetland habitat, including meadows, marsh, riparian scrub, woodland and forest, and open water and 39,400 acres (42%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest, would be within the area subject to take authorization. Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 10,613 acres (45%) of primary wetland habitat, including meadows, marsh, riparian scrub, woodland and forest, and open water and 50,057 acres (53%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest, would be within the area subject to take authorization.
coastal western whiptail – Cnemidophorus tigris multiscutatus MSHCP Project. Thirty-six of 54 records would be within the area subject to take authorization. However, of these, 16 are within existing agriculture, and 6 are located in developed or disturbed habitat. Approximately 182,962 acres (56%) of primary habitat, including coastal sage scrub, desert scrub, grassland, peninsular juniper woodland and scrub, playas and vernal pools, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Listed, Proposed, and Strong Candidate. At least 36 of the 54 records would be within the area subject to take authorization. Approximately 197,900 acres (61%) of primary habitat, including coastal sage scrub, desert scrub, grassland, peninsular juniper woodland and scrub, playas and vernal pools, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Listed and Proposed. At least 36 of the 54 records would be within the area subject to take authorization. Approximately 209,400 acres (64%) of primary habitat, including coastal sage scrub, desert scrub, grassland, peninsular juniper woodland and scrub, playas and vernal pools, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization. Existing Reserves. At least 36 of the 54 records would be within the area subject to take authorization. Approximately 261,144 acres (80%) of primary ha

Table 4C - Comparison of Effects on Non-Listed Covered Species by Alternative

INVERTEBRATES/CRUSTACEANS

Santa Rosa Plateau fairy shrimp – Linderiella santarosae

MSHCP Project. No known localities of this species would be impacted. Approximately 1,159 acres (15%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Wetland areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to vernal pools shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 2,053 acres (26%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization.

Listed and Proposed. Same as Listed, Proposed, and Strong Candidate Alternative.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to suitable habitat. Approximately 4,987 acres (63%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization.

FISH

arroyo chub – Gila orcutti

MSHCP Project. No known breeding or occupied locality would be within the area subject to take authorization. Approximately 1,870 acres (15%) of suitable habitat including water habitats would be within the area subject to take authorization. Riverine areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riverine areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. The locality that would be within the area subject to take authorization. is the Santa Margarita River. Approximately 2,115 acres (17%) of suitable habitat including water habitats would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Santa Margarita River and Murrieta Creek near its confluence with the Santa Margarita River and Temecula Creek. Approximately 2,205 acres (18%) of suitable habitat including water habitats would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Santa Margarita River and Murrieta Creek near its confluence with the Santa Margarita River and Temecula Creek. Approximately 3,060 acres (25%) of suitable habitat including water habitats would be within the area subject to take authorization.

AMPHIBIANS

western spadefoot – Scaphiopus hammondii

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be subject to take authorization. Approximately 1,162 acres (15%) of primary habitat including playas and vernal pools occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Approximately 348,923 acres (51%) of secondary habitat including chaparral, coastal sage scrub, grassland, and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be within the area subject to take authorization include Banning, Badlands, area south of Hemet, Anza/Sage/Wilson Valley, Moreno Valley, Beaumont, Canyon Lake, Corona, Murrieta, Murrieta Hot Springs, El Cerrito, and March Air Reserve Base (ARB). Approximately 2,053 acres (26%) of primary habitat including playas and vernal pools occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Approximately 348,923 acres (51%) of secondary habitat including chaparral, coastal sage scrub, grassland, and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be within the area subject to take authorization include Banning, Badlands, area south of Hemet, Anza/Sage/Wilson Valley, Moreno Valley, Beaumont, Canyon Lake, Corona, Murrieta, Murrieta Hot Springs, El Cerrito, and March ARB. Approximately 2,053 acres (26%) of primary habitat including playas and vernal pools occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization. Approximately 370,193 acres (53%) of secondary habitat including chaparral, coastal sage scrub, grassland and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to localities and suitable habitat. Localities that would be affected include Lee Lake/Alberhill/Elsinore, Antelope Valley, Good Hope, Badlands, Tule Valley, Banning, Badlands, area south of Hemet, Anza/Sage/Wilson Valley, Moreno Valley, Beaumont, Canyon Lake, Corona, Murrieta, Murrieta Hot Springs, El Cerrito, Hogbacks, Sedco Hills, Temescal Wash, Bautista Creek, and March ARB. Approximately 4,897 acres (63%) of suitable habitat including playas and vernal pools would be within the area subject to take authorization. Approximately 449,328 acres (65%) of secondary habitat including chaparral, coastal sage scrub, grassland, and Riversidean alluvial fan sage scrub occurring in areas below 4,900 feet in elevation would be within the area subject to take authorization.

coast range newt – Taricha tarosa tarosa

MSHCP Project. Individuals occurring outside of the MSHCP Conservation Area would be subject to take authorization. Approximately 4,010 acres (32%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water within the Santa Ana Mountains bioregion would be in areas subject to take authorization. Approximately 32,069 acres (30%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub would be within the area subject to take authorization within the Santa Ana Mountains bioregion. Riparian areas not included as part of the MSHCP Conservation Area would be subject to the policy related to riparian, riverine, and vernal pool areas presented in Section 6.1.2 of the MSHCP, Volume I, and impacts to riparian areas shall be avoided and minimized in accordance with the procedures presented in that policy.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary and secondary habitats. Approximately 4,632 acres (37%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water within the Santa Ana Mountains bioregion would be in the area subject to take authorization. Approximately 32,069 acres (30%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary and secondary habitats. Approximately 4,536 acres (36%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water would be within the area subject to take authorization. Approximately 32,069 acres (30%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary and secondary habitats. Approximately 5,152 acres (41%) of primary habitat including playas and vernal pools, riparian scrub, woodland and forests, and water would be affected within the Santa Ana Mountains bioregion. Approximately 36,760 acres (34%) of secondary habitat including chaparral, coastal sage scrub, grasslands, and Riversidean alluvial fan sage scrub, would be affected within the Santa Ana Mountains bioregion.

REPTILES

western pond turtle – Clemmys marmorata pallida

MSHCP Project. The incidental take of the western pond turtle is difficult to quantify due to limited knowledge of its distribution and abundance within the Plan Area. The maximum level of incidental take of western pond turtle can be anticipated by the loss of habitat. Individuals outside the MSHCP Conservation Area would be subject to take authorization. Approximately 5,331 acres (22%) of primary wetland habitat for western pond turtle in the Plan Area would be within the area subject to take authorization. This includes meadows, marsh, riparian scrub, woodland and forest, and open water and 34,068 acres (36%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest.

Listed, Proposed, and Strong Candidate. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 7,200 acres (30%) of primary wetland habitat, including meadows, marsh, riparian scrub, woodland and forest, and open water and 37,300 acres (40%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest, would be within the area subject to take authorization.

Listed and Proposed. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 7,500 acres (32%) of primary wetland habitat, including meadows, marsh, riparian scrub, woodland and forest, and open water and 39,400 acres (42%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest, would be within the area subject to take authorization.

Existing Reserves. Same as MSHCP Project with the exception of increased impacts to primary habitat. Approximately 10,613 acres (45%) of primary wetland habitat, including meadows, marsh, riparian scrub, woodland and forest, and open water and 50,057 acres (53%) of suitable adjacent upland habitat, including chaparral, coastal sage scrub, grassland, Riversidean alluvial fan sage scrub, and woodland and forest, would be within the area subject to take authorization.

coastal western whiptail – Cnemidophorus tigris multiscutatus

MSHCP Project. Thirty-six of 54 records would be within the area subject to take authorization. However, of these, 16 are within existing agriculture, and 6 are located in developed or disturbed habitat. Approximately 182,962 acres (56%) of primary habitat, including coastal sage scrub, desert scrub, grassland, peninsular juniper woodland and scrub, playas and vernal pools, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Listed, Proposed, and Strong Candidate. At least 36 of the 54 records would be within the area subject to take authorization. Approximately 197,900 acres (61%) of primary habitat, including coastal sage scrub, desert scrub, grassland, peninsular juniper woodland and scrub, playas and vernal pools, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Listed and Proposed. At least 36 of the 54 records would be within the area subject to take authorization. Approximately 209,400 acres (64%) of primary habitat, including coastal sage scrub, desert scrub, grassland, peninsular juniper woodland and scrub, playas and vernal pools, and Riversidean alluvial fan sage scrub, would be within the area subject to take authorization.

Existing Reserves. At least 36 of the 54 records would be within the area subject to take authorization. Approximately 261,144 acres (80%) of primary ha

WESTERN RIVERSIDE COUNTYMULTIPLE SPECIES HABITAT CONSERVATION PLAN

4.0 ENVIRONMENTAL IMPACTS / ENVIRONMENTAL CONSEQUENCES

Thresholds of Significance/Criteria for Determining Significance

Impact Analysis per Issue Statement

Mitigation Measures

Level of Significance after Mitigation

4.1 Biological Resources

4.1.1 Introduction

Impact Analysis Considerations

4.1.2 Assumptions

4.1.3 Thresholds of Significance/Criteria for Determining Significance

4.1.4 Impacts

MSHCP Proposed Project

Narrow Endemic Plant Species Policy

Additional Survey Needs Policy

Listed Covered Wetland Species

WESTERN RIVERSIDE COUNTY
MULTIPLE SPECIES HABITAT CONSERVATION PLAN