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(c) <br /> <br />Storm drainage system improvements (channels, culverts, streets, open spaces, <br />detention/retention basins, and site grading) shall be designed in a comprehensive <br />manner such that no habitable buildings are subject to flooding during a FEMA <br />100-year storm event. <br /> <br />(d) <br /> <br />Subject to obtaining all necessary permits and approvals from jurisdictional <br />agencies, certain existing B-Line channels may be placed within a culvert or <br />relocated. These channels anticipated to be placed within culverts or relocated <br />include: <br /> <br />(i) <br /> <br />Line B-2-1 and B-2-2, as necessary to re-route drainage around the <br />proposed UPRR underpass. <br /> <br />(ii) <br /> <br />Line B-2-3, from the Alameda County Transportation Corridor to <br />Line B-2-1 along the UPRR railroad right-of-way. <br /> <br />(iii) <br /> <br />Line B-2-1, from the Alameda County Transportation Corridor to its <br />connection with Line B-2-3, to be relocated to carry flows southward <br />along the Alameda County Transportation Corridor right-of-way within an <br />open channel to the toe of the knoll, and then placed within a culvert under <br />the UPRR right-of-way. <br /> <br />(iv) <br /> <br />An un-numbered channel that carries drainage from the Alameda County <br />fairgrounds from Bemal Avenue to Line B-2-2 (along the UPRR <br />right-of-way). <br /> <br />(v) <br /> <br />An un-numbered channel that carries drainage from adjacent Kaiser <br />property to Line B-2-1 along the UPRR right-of-way. <br /> <br />(vi) <br /> <br />An un-numbered channel that carries drainage along Bernal Avenue to <br />Line B-2-1 along the UPRR right-of-way. <br /> <br />Phase I improvements are anticipated to include only the rerouting described in (i) <br />above and street crossings of the B-2-3 line and the B-2-1 trench as shown on <br />Exhibit 13. <br /> <br />(e) <br /> <br />Storm water detention basins shall be designed within the City's Phase II lands, <br />and may be constructed within neighborhood parks, and/or other open space areas <br />if no other areas are reasonably feasible, to temporarily detain the <br />post-development peak ruunffincrease from the site anticipated under DO-year <br />storm event conditions. Runoff from development of the Eastern Area need not <br />be directly detained; detention basins in the other Areas may be designed to hold <br />the Eastern Area's contribution to increased run-ofl~ <br /> <br /> (i) City standard design criteria shall be used for all detention lhcilities. <br /> <br />Conditions of Approval Page 32 of 49 Revised August 21, 2000 <br /> <br /> <br />