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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 and reliable, except for November 14, <br />2006 to March 27, 2007, when the DCP was shut down for the winter. Gage height was affected by ice <br />during the period November 2-13, 2006. Satellite daily gage heights agree with chart data to within <br />±0.01 ft. Encoder calibration was checked with 29 visits while the gage was open. The record is good, <br />except for November 2-15, 2006, which is fair due to ice effect, and November 14, 2006 to March 27, 2007, <br />which is estimated and poor. Station operated and record developed by Mike Wild. <br /> <br />RATING TABLE.--STD25FTPF USED FROM 01-OCT-2006 TO 30-SEP-2007 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2006 TO SEPTEMBER 2007 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 54 52 20 10 10 15 47 59 260 228 182 93 <br /> 2 54 44 20 10 10 15 51 82 248 223 158 87 <br /> 3 55 46 20 10 10 15 51 91 268 211 215 87 <br /> 4 62 51 20 10 10 15 45 86 270 200 277 79 <br /> 5 58 46 20 10 10 15 43 83 302 200 319 75 <br /> 6 60 46 20 10 10 15 42 86 327 247 338 78 <br /> 7 60 46 20 10 10 15 41 112 310 266 316 72 <br /> 8 64 46 20 10 10 15 40 126 278 264 256 68 <br /> 9 80 43 20 10 10 15 40 125 250 253 193 64 <br /> 10 90 39 20 10 10 15 39 100 259 226 157 62 <br /> 11 85 31 15 10 10 20 34 89 265 181 134 57 <br /> 12 73 30 15 10 10 20 37 100 288 174 117 50 <br /> 13 69 27 15 10 10 20 42 140 328 186 110 46 <br /> 14 67 25 15 10 10 20 36 162 317 154 102 44 <br /> 15 70 25 15 10 10 20 39 157 320 141 96 43 <br /> 16 70 25 15 10 10 30 38 169 348 134 130 41 <br /> 17 67 25 15 10 10 30 46 197 372 131 183 51 <br /> 18 75 25 15 10 10 30 47 250 389 135 252 78 <br /> 19 65 25 15 10 10 30 43 337 374 147 234 66 <br /> 20 67 25 15 10 10 30 40 419 339 163 201 61 <br /> 21 70 25 15 10 10 35 39 457 309 158 168 57 <br /> 22 66 25 15 10 10 40 39 429 307 164 145 55 <br /> 23 60 25 15 10 10 50 37 379 309 148 114 55 <br /> 24 61 25 15 10 10 50 41 336 305 150 97 56 <br /> 25 61 25 15 10 10 50 46 333 289 153 94 53 <br /> 26 62 25 10 10 10 52 43 287 274 170 83 51 <br /> 27 55 25 10 10 10 54 40 260 263 193 80 47 <br /> 28 64 25 10 10 10 53 40 261 252 237 85 44 <br /> 29 71 25 10 10 --- 47 41 263 242 238 84 44 <br /> 30 70 25 10 10 --- 43 46 264 233 225 91 44 <br /> 31 61 --- 10 10 --- 43 --- 264 --- 205 88 --- <br /> <br />TOTAL 2046 972 485 310 280 917 1253 6503 8895 5905 5099 1808 <br />MEAN 66.0 32.4 15.6 10.0 10.0 29.6 41.8 210 297 190 164 60.3 <br />AC-FT 4060 1930 962 615 555 1820 2490 12900 17640 11710 10110 3590 <br />MAX 90 52 20 10 10 54 51 457 389 266 338 93 <br />MIN 54 25 10 10 10 15 34 59 233 131 80 41 <br /> <br />CAL YR 2006 TOTAL 24637 MEAN 67.5 MAX 339 MIN 5 AC-FT 48870 <br />WTR YR 2007 TOTAL 34473 MEAN 94.4 MAX 457 MIN 10 AC-FT 68380 <br /> <br />MAX DISCH: 472 CFS AT 12:15 ON May. 21, 2007 GH 2.7 FT. SHIFT 0.03 FT. <br />MAX GH: 2.7 FT. AT 12:15 ON May. 21, 2007 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br /> <br /> <br /> <br />