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X I I Notification#1600-2013-0356-R3 Streambed Alteration Agreement Page 2 of 23 Site 2. Atherton Creek between Marsh Road and Rolison Road; Latitude 37°28'S4.02"N, Longitude 122°11'01.07"W; adjacent to APNs: 055-251-250 and 055-251-350. PRO ECT DESCRIPTION As part of routine maintenance activities, to maintain channel capacity and prevent flooding of adjacent commercial and industrial areas in the vicinity of Atherton Creek, the project includes removal of sediment, in-stream vegetation, vegetation on the bank, debris and trash within the channel. Routine maintenance activities authorized under this Agreement are limited to the following: • Remova/of Sediment in the Stream Channel Bottom and around Bridges, Cu/verts, Storm �rain Out/ets and Water Diversion lnlets— Utilizing a clamshell bucket for removal of sediment in a concrete-lined portion and an earthen bottom portion of Atherton Creek to maintain channel capacity; • Removal of Obstructions around Structures and Facilities— Utilizing hand tools and a clamshell bucket for removal of trash and debris embedded within the stream channel and utilizing hand tools where clamshell bucket cannot reach; • Vegetation Management within the Channel and Lower Stream Bank- Utilizing hand tools for removal of living vegetation in the channel and on the lower half of the creek banks. Trees and other woody vegetation shall only be trimmed, not removed; • Vegetation Management on Upper Ha/f of Bank and Top of Levee - Utilizing hand tools for removal of vegetation and mowers for mowing levee slopes and top of bank; • Removal of Invasive, Non-native Plants— Removal of invasive, non-native plants utilizing hand tools. PRO ECT IMPACTS Existing fish or wildlife resources the project could substantially adversely affect include: saltmarsh harvest mouse, a species listed as Endangered under both the Endangered Species Act (ESA) and the California Endangered Species Act (CESA) and fully protected under FGC; saltmarsh common yellowthroat, designated as a Species of Special Concern; other migratory, foraging and nesting birds; bats; water quality; and temporary impacts to 950 linear feet of emergent vegetation. The adverse effects the project could have on the fish or wildlife resources identified Page 8 of 30