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GM7 The proposed landfill expansion site has a relatively flat topography, ranging in elevation from 30 to 40 feet msl. The north branch of the south fork of Littlejohn Creek, the area affected by the landfill expansion, has a trapezoidal cross section with 2:1 side slopes. Channel width on the project site ranges from 8 to 18 feet. Water levels in the strearn range from a few inches to over 5 feet during storm events. The stream is generally perennial, although creek flows in summer and fall are substantially lower than in winter. The existing channel banks are earthen, steep, sparsely vegetated with non-native grasses and ruderal species. Juvenile riparian trees are scattered throughout the length of the channel, • mature riparian trees and shrubs are absent, primarily because of routine flood -control maintenance activities. Within the stream channel, floating and emergent aquatic vegetation occur in a narrow strip along the water's edge. Of the 2.895 acres delineated as waters of the United States, the total vegetated wetland area is approximately 0.859 acre. The final environmental impact report (EIR) for the Austin Road Landfill Expansion Project (SCH 90020718) was certified by the Stockton City Council on September 6, 1994. The EIR MIxratO Tie sulearn ano er-LIMICEIg alignment, subject to potential surface -water contamination from the expanded landfill. The OR concluded that implementation of the mitigation measures would reduce the impact to less -than - significant levels. has been made to the Uatitorrua Aegional';Tater,fonffUfis OM Region. Based on surveys prepared • the Austin Road Landfill Expansion project EIR, • federally fisted threatened or endangered species would be affected by the proposed landfill expansion. The cultural resources study prepared for the project EIR identified no archaeological, historical, or other sites of cultural signcance on the Austin Road .:.• site. The study was submitted to the State Ffistoric Preservation Officer (SHPO) who concurred with that finding. The City initially requested Section 404 authorization under Nationwide Permit 26 in October 1995. Subsequent conversations with the U. S. Army Corps of Engineers (Corps) revealed that the project area was below the headwaters of Littlejohns Creek; consequently, the predischarge notification was withdrawn. The applicant is now applying for an individual permit under Section 404. Cin• of Stock -ion Permit Application for the Austin Road April 5. 1996 3 LAndfill Expansion Project :3