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<br />LOCAT I ON <br /> <br /> I I 1.,12 <br /> TA8LE 111"2 <br />lOa-YEAR PEAK FLOW SUMMARY <br />FUTURE 8ASIN DEVELOPMENT <br />EXISTING CHANNEL MASTER PLAN CHANNEL <br /> ---- ----~---- <br />With Wi thout Wi th Wi thout <br />Maple Maple Per- Maple Maple Per-- <br />Grove Grove cent G ro ve Grove cent <br />Res. Res. I ne- Res. Res. 1 nc. <br /> --, .----- ---. .---- --- <br />1490 3830 257 1500 38~)0 257 <br />2450 4250 173 2400 4200 17', <br />2450 4250 173 2450 4300 17'; <br />2550 4530 177 2850 4900 172 <br /> <br />Maple Grove <br />Spi llway <br /> <br />Quail Street <br /> <br />Ki p 1 i ng Street <br /> <br />Clear Creek <br /> <br />Interstate 70 Detention Reservoir. During Phase 8 of this study. two <br />specific locations for detention pond sites in Jefferson County were <br />studied. These were located in the Interstate 70 - U.S. 6 vicinity and <br />immediately upstream from Interstate 70 at Lena Gulch. Because of the <br />limited tributary area at the Interstate 70 - U.S. 6 location, the cost <br />to build this structure would not compensate for the benefits received. <br />However, at the Interstate 70 and Lena Gulch location, it was found <br />that a side channel detention reserVOil" ,:ould reduce the downstream <br />peaks as follows: <br /> <br />Volume of Detention Reservc,; r <br />(Acre- fee t) <br /> <br />-0- <br /> <br />20 <br /> <br />40 <br /> <br />65 <br /> <br />100 <br /> <br />Flow DOIvnstream <br />.of 1-70 (ci~2.L <br /> <br />3750 <br />3000 <br /> <br />2650 <br /> <br />2250 <br /> <br />1750 <br /> <br />A detention reservoir at this location is valid, as shall be discussed in <br />Sec t i on V I I J . <br />