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<br />e <br /> <br />e <br /> <br />e <br /> <br />COLORADO WATER CONSERVATION BOARD <br />INSTREAM FLOW RECOMMENDATIONS <br /> <br />RECOMMENDATION SUMMARY REPORT <br /> <br />STREAM: <br />WATERSHED: <br /> <br />North Boulder Creek <br />South Platte <br /> <br />Boulder <br /> <br />10: <br />DIV: 1 , COUNTY: <br /> <br />RECOMMENDATION <br />FLOW (cfs): 4.0 (4/1-10/31) <br />1.5 (11/1-3/31) <br /> <br />LENGTH (miles): <br /> <br />4.0 <br /> <br />UPPER TERMINUS: <br /> <br />Silver Lake Diversion Structure at <br />lat 40 30 19N long 105 33 28W <br /> <br />LOWER TERMINUS: <br /> <br />confl with Lakewood Reservoir Inlet in <br />NE/4 SE/4 Sl TIS R73W 6PM <br /> <br />USGS QUADS: <br /> <br />Ward, Nederland <br /> <br />FISH SURVEY <br />DOW CODE: 10265 <br />SAMPLE SUMMARY: <br /> <br />DATE: 09/27/91 <br />LOCATION: 2 miles upstream on Caribou Ranch <br />245 ft electrofished. Sample included: 15 Brook Trout, 5-10" <br />14 Rainbow Trout, 5-11". 1 Rainbow Cutthroat Cross 7.5". <br /> <br />FIELD SURVEY <br />CROSS SECTION LOCATION: 2 <br />MEASURED FLOW (cfs): 3.15 <br />REMARKS: None <br /> <br />DATE: 09/23/91 <br />miles upstream of Hwy 72 on Caribou Ranch <br />GRASSLINE WIDTH (ft): 28.72 PHOTOS: Y <br /> <br />HYDRAULIC ANALYSIS <br />AT RECOMMENDED AVE DEPTH (ft): 0.45-0.49 <br />FLOW (cfs): 4.0 (4/1-10/31) % WET PERIM.: 29%-71% <br />AVE VEL. (fps): 0.41-0.44 <br />REMARKS: 4.0 cfs meets 2 of 3 criteria (avg. depth and wetted perimeter) <br />and is required to maintain this fishery. Lower winter flow (1.5 cfs) <br />requirement based on DOW biological recommendation. <br /> <br />WATER AVAILABILITY <br />METHOD: Estimated from Silver Lake gage <br />AVERAGE MONTHLY FLOWS (cfs) <br />OCT NOV DEC JAN FEB MAR APR MAY JUN JUL <br />14.9 4.7 3.4 2.5 2.4 2.9 5.9 12.1 86.8 86.5 <br />IMPORTED WATER: None. TRANSBASIN DIVS: None. <br />INBASIN DIVERSIONS: <br />REMARKS: See attached hydrograph. <br />Donated rights provide water for appropriation in this reach. <br /> <br />AUG SEP <br />44.3 23.0 <br /> <br />CONSULTATIONS <br />DOW: Jay Skinner <br />DWR: Alan Berryman <br /> <br /> <br />01/19/93 <br />02/23/93 <br /> <br />DATE: Yl-5h?:> <br />I <br /> <br />PREPARED BY: Baessler <br /> <br />APPROVED BY: <br />