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?Enviroramentul Araaly.ris <br /> T���c tx� 5quaze volume Linear <br /> Activity Excavated/ Location Feet ��,� Feet (� <br /> Fill Material (sq�} <br /> Install RSP for FiU/ RSP Creek bank below stormwatex 3' 2 4 <br /> stormwater outflow pipes,undex the U5 1 i�I <br /> discharge pipes overctossing <br /> Install retaining Excavation/ Creek bank below US 201 I��� I�] ���;' <br /> wall bank soil overcrossing <br /> Install retainuig Fi11/ bank soil Creek bank below U5 101 i 5.�t3 i 7 i� I?5 <br /> wail overcros sing <br /> The new pump station would have an outflow discharge rate of 32.40 cfs through the existing 24- <br /> inch storm drain leading into Redwood Creek. The peak outflow discharge xate would increase from <br /> 4.3 feet per secand (fps) to 10.3 fps,during extreme stor�n events. Because o�the length of the <br /> existing autflow pipe,there would not be any impacts to the bed and bank of Redwood Creek <br /> associated with the increased flow. <br /> The pxoposed cofferdam in Mitigarion Measure BIO 1 and the erosion controi measures in <br /> Mirigation Measuxe BIQ 7 would avoid ox reduce the potenrial for construcrion acrivi�y to affect <br /> wetlands and jurisdictional waters. With the implementation of the proposed BMPs and mitigation <br /> measures,the activiries would not have a substantial adverse impact to protected wetlands and <br /> jurisdictional waters. (Less thar� Significant Impact with Mitigarion Incorporation) <br /> d)Ititerfere substantially with the movernent ofanynattve residerlt armigratory�sh ar <br /> wrldlife species or with established rrative resident ot migtatary wjldltf'e corridats, or impede <br /> the use ofnauve wildlrfe r�ursery sites? <br /> The ptoposed activities would not interfere with the movement of migratory �ish or anima.l species. <br /> The creek bank is barren and subject to human disturbance. Redwood Creek is not a migxatory route <br /> for steelhead. The area of temporary dewatering is iidal and typically exposed during daily low tides. <br /> The temporary cofferdam would minimize the hydroacoustic effects to EFH and �ish species tl�at <br /> have a poteniial to occur in the adjacent areas of the creek (see Mirigarion Measure BIO 1). <br /> The increase in the disck�arge from the pump starion would occur during peak storm events when <br /> there are high flows in the creek. ilnder these conditions, the pxoposed increase would not�ave a <br /> significant effect on resident or migratory fish species. (Less than Significant Impact with <br /> Mirigatian Incorporation} <br /> ?-?3 US 109 Ped�st�ian Undercr•ossisag and Buir <br /> I.rlarad Raad Stor�r�Drain Paemp Stat�on Pr�ect <br />