CORRESPONDENCE_1987-1991 - Laserfiche WebLink

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Performance Standards Performance standards for created vernal pools, wetland swales, marshes, riparian, grassland, and upland tree and shrub.plantings are provided below. Performance standards for each vegetation type will vary depending on the results required by the mitigation plan. To adequately determine whether the vegetation creation has succeeded or failed (wetland and upland types), the vegetation of each mitigation site shall be monitored scientifically as described below. The vegetation monitoring shall be conducted annually, or more frequently if necessary. Minimum Performance Standards for Wetlands Mitigation Vernal Pools. Forty-six vernal pools (4.3 acres) will be created to replace 22 pools (1.6 acres) filled during the life of the project, which represents a 120 -percent increase in number of pools and a 170 -percent increase in vernal pool habitat area. At least 22 of the created vernal pools, totaling at least 1.6 acres (or an equivalent combination), must function as viable vernal pools by the end of the monitoring program to be considered successful. Wetland Swales. Six wetland Swale mitigation areas (8.3 acres) will be created to replace 4.1 acres of ephemerally wet swales filled during the life of the project; this _ replacement represents a 102 -percent increase in wetland Swale habitat area. At least 4.1 acres of this mitigation type must function as viable wetland Swale by the end of the monitoring program to be considered successful. Marsh. Four marsh mitigation areas (4.2 acres) will be created to replace 1.5 acres of marsh filled during the life of the project, which represents approximately a 180 -percent increase in marsh habitat area. At least 1.5 acres of this mitigation type must function as viable marsh by the end of the monitoring program to be considered successful. Riparian. Three riparian mitigation areas (1.6 acres) will be created to enhance wildlife habitat values of the mitigation area to offset, in part, loss of upland habitat during the life of the project. No riparian vegetation currently exists onsite. At least 0.8 acre of riparian vegetation must function as viable riparian habitat by the end of the monitoring program to be considered successful. " Uplands. The upland habitats, primarily grassland, will be monitored annually to determine the extent of plant cover and its effectiveness for erosion control and 1 screening. Grazing levels will be adjusted annually to permit at least 50 percent vegetative cover (or 900 lbs/acre RDM) by the end of the dry season (October 15). Grazing levels will be 51