Laserfiche WebLink
SAN LEANDRO SHORELINE DEVELOPMENT DRAFT EIR <br />CITY OF SAN LEANDRO <br />BIOLOGICAL RESOURCES <br />changes to the existing riprap shoreline to accommodate the proposed enhanced natural shoreline areas, <br />perched beach and steps, and pedestrian bridge at the mouth of the existing marina basin. Details on the <br />extent of dredging and fills in tidal areas and adjacent shoreline have not yet been refined as part of the <br />project, but encompass most of the shoreline to the existing marina basin and several new piers and <br />promenade treatments along the shoreline to the bay. Modifications below the Mean High Water would <br />be regulated activities subject to authorization from the Army Corps and RWQCB. Fills in the golf course <br />area include culverting of a portion of the drainage channel along the east side of Monarch Bay Drive and <br />eliminating the southern pond. An estimated 600 linear feet of the existing man-made drainage ditch in <br />the golf course area (see Figure 4.3-3) would also be filled to accommodate the North Golf Course <br />Residential area, affecting an estimated 0.11 acre of cattail dominated freshwater marsh. Although it is a <br />man-made drainage ditch, based on the presence of wetland vegetation and hydrologic connection to the <br />bay, it appears this feature may be considered jurisdictional wetlands by the Army Corps and/or CDFW. <br />The southern pond would also be filled to accommodate the South Golf Course Residential area. <br />However, this pond is a man-made waterbody that contains no prominent wetlands and appears to be <br />hydrologically isolated, and may therefore not be a jurisdictional water regulated by the Army Corps, <br />RWQCB and/or CDFW. <br />Modifications to regulated waters would require appropriate authorizations from State and federal <br />regulatory agencies, including the Army Corps and RWQCB under Section 404 and 401 of the Clean Water <br />Act, and possibly CDFW under the Streambed Alteration Agreement program. Further review would be <br />provided by these regulatory agencies when a permit application was formally submitted for <br />authorization of activities within jurisdictional limits. If regulated wetland habitat is affected, possibly <br />including the linear drainage channel on the east side of Monarch Bay Drive, a compensatory mitigation <br />program will likely be required as part of the regulatory agency authorizations. A program to monitor and <br />maintain any created habitat provided as mitigation would be a requirement of the regulatory agency <br />authorizations, ensuring adequate compensatory mitigation and successful establishment of any <br />replacement marshland and adjunct upland vegetation. As discussed in Section 4.8, Hydrology and Water <br />Quality, best management practices (BMPs) would be utilized to prevent any construction -generated <br />sediments or pollutants from entering the surrounding wetlands and open water habitat, although no <br />stormwater pollution program has been prepared for the Project. Overall, if the waters described above <br />are determined to be regulated waters and not exempt as man-made features, this would be considered <br />a significant impact. <br />Impact BIO -3: Proposed development would result in fills and modifications to jurisdictional waters, which <br />would require appropriate controls, compensatory mitigation, and regulatory authorizations. <br />Mitigation Measure BIO -3: Provide Compensatory Mitigation for Wetland Modifications. A <br />compensatory mitigation program shall be developed and implemented to provide adequate <br />mitigation for jurisdictional waters affected by proposed improvements. Ajurisdictional wetland <br />delineation shall be prepared by a qualified wetland specialist and submitted for verification by the <br />Army Corps. A Wetland Protection and Replacement Program (WPRP) shall be prepared by the <br />qualified wetland specialist and implemented to provide compensatory mitigation at a minimum 2:1 <br />ratio where wetland habitat is affected, shall minimize disturbance to unvegetated waters, and shall <br />be reviewed and approved by regulatory agencies. The WPRP shall include appropriate <br />implementation measures to prevent inadvertent loss and degradation of jurisdictional waters to be <br />4.3-18 DECEMBER 2014 <br />