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150' 0 150' 300' <br />1 " =300' <br />AMENDMENT4 <br />PHASE 7 AREA <br />CHANNEL <br />U.S. HIGHWAY 50 BYPASS <br />I I <br />BROWN I I <br />SUB. I EXISTING 150' ^_ <br />AIN GRAVEL <br />3S ROAD AND <br />THROUGH <br />VEL <br />OFF SITE <br />DRAINAGE <br />CHANNEL <br />OFF SITE DRAINAGE <br />DISCHARGE <br />NOTES: <br />1. AVERAGE BACKFILL ELEVATION IS 11 <br />FEET BELOW EXISTING GRADE. <br />2. NO EXPOSED GROUNDWATER <br />REMAINS. <br />3. THE TOPSOIL BACKFILLED ON THE <br />BASIN BOTTOM AND SIDE SLOPES WILL <br />BE ROUGH GRADED AND SEEDED. <br />4. THE BASIN BOTTOM WILL BE SLOPED <br />DOWN AT 1± GRADE TO THE RUNOFF <br />CHANNELS. THEREFORE THE ELEVATION <br />OF THE NORTHERN EDGE OF THE BASIN <br />WILL BE 2' TO 3' HIGHER THAN THE <br />ELEVATION OF THE RUNOFF CHANNEL. <br />0 <br />Og <br />LLJ0 <br />U <br />'^ 5 U Z <br />VJ F y <br />Z n 6 <br />�LLo <br />� O o <br />F- <br />Z Z <br />� Q <br />Z d <br />w Z <br />Q O <br />~ m F <br />� = Q <br />Q W Q <br />W J <br />o U <br />J w <br />m N <br />� L.L <br />a <br />y � { <br />N o N tl <br />9 m U M 3 <br />g <br />w a E c <br />pL <br />2a m <br />6 m <br />