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3 <br />PLATTE RIVER BASIN <br /> <br />06694920 SOUTH PLATTE RIVER ABOVE SPINNEY MOUNTAIN RESERVOIR, CO <br /> <br />LOCATION.--Lat 38°59'10", long 105°40'52" in NE1/4 Sec 21, T. 12S, R. 74W, Park County, 3.3 miles below the <br />confluence of the Middle and South Forks of the South Platte River, and 7 miles southeast of Hartsel, CO. <br /> <br />DRAINAGE AREA AND PERIOD OF RECORD.--772 sq. mi.; 1983 to current year. <br /> <br />GAGE.--Graphic water-stage recorder and satellite monitoring (Sutron Satlink 2 DCP and shaft encoder) at a 25-foot <br />concrete Parshall flume with a wooden shelter and concrete well with inside electric tape gage and in-flume <br />staff gage. Gage is operated and equipment is maintained by the city of Aurora. <br /> <br />REMARKS.--Record is taken from hourly satellite readings and is complete except for November 15, 2005 to April <br />12, 2006 when the DCP was shut down for the winter. Gage height was possibly affected by ice during the <br />period October 31 to November 15, 2005. Satellite daily gage heights agree with chart data to ±0.02 ft. <br />Encoder calibration was checked with 28 visits while the gage was open. The record is good, except for <br />October 31, 2005 - November - 15, which is Fair due to ice effect and November 16 - April 12, which is <br />estimated and poor. Station operated by Garver Brown and record developed by Lee Cunning. <br /> <br />RATING TABLE.--STD25FTPF USED FROM 01-OCT-2005 TO 30-SEP-2006 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2005 TO SEPTEMBER 2006 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 22 39 20 20 15 5.0 10 48 167 126 95 63 <br /> 2 26 37 20 20 15 5.0 10 45 188 145 86 61 <br /> 3 27 37 20 20 15 5.0 10 43 216 160 84 54 <br /> 4 26 35 20 20 15 5.0 10 45 234 181 124 51 <br /> 5 27 36 20 20 15 5.0 10 49 239 186 95 49 <br /> 6 29 34 20 20 15 5.0 10 57 244 223 126 41 <br /> 7 29 38 20 20 15 5.0 10 59 253 232 130 45 <br /> 8 28 37 20 20 5.0 5.0 10 55 258 240 130 62 <br /> 9 35 37 20 20 5.0 5.0 10 53 268 308 121 91 <br /> 10 59 32 20 20 5.0 5.0 10 52 250 339 131 74 <br /> 11 54 33 20 20 5.0 5.0 10 49 224 308 113 63 <br /> 12 49 38 20 20 5.0 5.0 20 47 211 248 104 56 <br /> 13 52 33 20 20 5.0 5.0 36 47 198 203 123 50 <br /> 14 55 37 20 5.0 5.0 5.0 39 57 196 169 122 45 <br /> 15 57 35 20 5.0 5.0 5.0 42 84 203 147 106 44 <br /> 16 54 35 20 5.0 5.0 5.0 41 96 192 130 94 46 <br /> 17 50 35 20 5.0 5.0 5.0 38 110 170 117 82 46 <br /> 18 46 35 20 5.0 5.0 5.0 35 132 151 115 101 45 <br /> 19 55 35 20 5.0 5.0 5.0 34 161 150 116 140 44 <br /> 20 68 35 20 5.0 5.0 5.0 35 184 150 117 142 44 <br /> 21 57 35 20 5.0 5.0 5.0 34 213 148 117 119 56 <br /> 22 52 35 20 5.0 5.0 5.0 34 238 157 109 102 61 <br /> 23 48 35 20 5.0 5.0 5.0 34 258 160 106 89 70 <br /> 24 46 35 20 5.0 5.0 5.0 36 219 157 107 79 76 <br /> 25 45 35 20 5.0 5.0 5.0 43 193 160 111 80 69 <br /> 26 43 35 20 5.0 5.0 5.0 43 208 178 136 91 65 <br /> 27 42 35 20 5.0 5.0 10 40 226 187 135 118 61 <br /> 28 42 35 20 15 5.0 10 41 222 175 110 99 57 <br /> 29 41 35 20 15 --- 10 47 204 159 95 86 55 <br /> 30 40 35 20 15 --- 10 46 188 136 82 75 55 <br /> 31 38 --- 20 15 --- 10 --- 168 --- 75 58 --- <br /> <br />TOTAL 1342 1063 620 390.0 210.0 180.0 828 3810 5779 4993 3245 1699 <br />MEAN 43.3 35.4 20.0 12.6 7.50 5.81 27.6 123 193 161 105 56.6 <br />AC-FT 2660 2110 1230 774 417 357 1640 7560 11460 9900 6440 3370 <br />MAX 68 39 20 20 15 10 47 258 268 339 142 91 <br />MIN 22 32 20 5.0 5.0 5.0 10 43 136 75 58 41 <br /> <br />CAL YR 2005 TOTAL 16785 MEAN 46.0 MAX 200 MIN 5 AC-FT 33290 <br />WTR YR 2006 TOTAL 24159 MEAN 66.2 MAX 339 MIN 5 AC-FT 47920 <br /> <br />MAX DISCH: 374 CFS AT 15:15 ON Jul. 10, 2006 GH 2.32 FT. SHIFT 0.04 FT. <br />MAX GH: 2.32 FT. AT 15:15 ON Jul. 10, 2006 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br /> <br /> <br />