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Draft Supplemental Environmental Impact Report Page IV.F-23 Forward Inc. Landfill 2014 Expansion Project • The location(s) of mitigation areas, including the types and extent of each habitat type to be created. • Mitigation for loss of existing wetlands shall be provided by the creation of 4 acres (3:1 mitigation ratio) of wetlands meeting the current federal definition, and 9 acres of riparian plantings (2:1 mitigation ratio). • All graded or filled areas within the habitat restoration area shall be seeded with appropriate mixes of native grass and forb species, developed by a qualified restoration ecologist. • Restored wetlands and riparian habitat shall have an equal or higher habitat value; • A water budget shall be prepared analyzing water demand for each mitigation habitat type and the ability of the watershed to support the target habitats. • The stated goal of the mitigation effort shall be to establish self-sustaining native riparian vegetation that shall not require long-term irrigation or maintenance. —' • The mitigation site shall include the establishment of a vegetated upland buffer no less than 50 feet wide on both sides of the recreated channel, where practicable. • Provide grading details, analysis of site hydrology and its ability to support the proposed riparian vegetation, location and quantities of all plant materials to be installed, native seed mixes to be used on all bare ground surfaces, monitoring procedures and schedules, _ identification of remedial measures, and performance criteria to be used by the agencies to assess success or failure of the mitigation effort. • Long-term monitoring of at least five years shall be funded by the Project Sponsors, subject _ to approval by the regulatory agencies. • Annual monitoring reports shall be submitted to each permitting agency. • A wetland delineation and habitat map shall be prepared during the final year of _ monitoring and included in the final annual report. • Subject to review and modification by the regulatory agencies, specified success standards _ shall call for, at a minimum, 80% survival of all container plantings and 75% total vegetative cover at the end of the monitoring period and after at least two consecutive years of no supplemental irrigation. This mitigation measure would reduce potential impacts to the Creek to less than significant levels because it will provide restored habitat at an equal or greater value to the lost habitat. This plan also would be consistent with the wetland mitigation goals outlined in the SJMSCP (SJCOG 1999) and the SJCGP (San Joaquin County 1992). Impact F.2. Potential "Take" of Chinook Salmon and Steelhead. Construction of the realigned channel and abandonment of the existing channel could result in the stranding of fish. In — addition, if the relocated channel is opened up immediately prior to a significant rainfall event and/or a significant release of irrigation water, a sediment plume could attract Chinook salmon and/or steelhead from the San Joaquin River into the channel and cause potential mortality to the fish. This is a potentially significant impact. In the long term, restoration of this branch of the creek would provide habitat for some semi- aquatic and riparian wildlife species,but is not expected to provide suitable habitat for — salmonids due to low flows and the highly modified flow regime (pers. comm. Sydney Temple, Questa Engineering Corporation).