Annual Report 2005 (62.7MB) - Western Riverside County Regional ...

2.0 HABITAT GAINS AND LOSSES2.1.4 Rough Step 4Rough Step 4 encompasses over 212,000 acres within the southeastern corner of westernRiverside County and includes Proposed Core 4 and Proposed Core 7 (see Figure 6, Rough StepUnit #4). These areas are composed of upland and wetland habitat types in the Vail Lake, Sage,and Wilson Valley areas. This area is bounded by Diamond Valley Lake, Lake Skinner, andJohnson Ranch to the west, San Diego County and the Agua Tibia Mountains to the south, andthe San Jacinto Mountains and eastern Riverside County to west. There are approximately106,000 acres within the Criteria Area in this rough step unit. Key vegetation communitieswithin Rough Step 4 include coastal sage scrub; desert scrubs; grasslands; riparian scrub,woodland, forest; Riversidean alluvial fan sage scrub; and woodlands and forests. Rough stepacreage goals are therefore provided for each of these habitat types. Table 5, Rough Step 4Acreage Totals, also includes acres conserved for habitats for which rough step acreage goals donot exist.TABLE 5Rough Step 4 Acreage TotalsFrom Table 6-3 in MSHCPPrivateLand Acreswithin theCriteriaArea in theRough StepAdditionalReserve LandAcreage Goalfor the KeyVegetationCommunityTotal AcresConserved(betweenFebruary 2000andDecember 31,2005)AllowableDevelopmentAcreagethroughDecember 31,2005 (UtilizingRough StepForecastingFormula)Total AcresAuthorized forDevelopment byCities and theCounty (betweenJune 22, 2004, andDecember 31,2005)Key Vegetation Communities within theRough StepCoastal Sage Scrub 21,340 17,460 795 177 415Desert Scrubs 4,340 3,680 66 12 44Grasslands 10,990 5,960 143 121 350Riparian Scrub, Woodland, Forest 1,420 1,320 0 0 0Riversidean Alluvial Fan Sage Scrub 1,160 1,090 40 3 2Woodlands and Forests 1,560 870 52 41 24Remaining Vegetation Categories without Rough Step Acreage GoalsAgricultural Land 10 48Chaparral 2,122 700Developed or Disturbed 9 87Total: 3,237 1,670Western Riverside County MSHCP October 2006Annual Report (January 1, 2005 through December 31, 2005) 2-13