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6 <br />PLATTE RIVER BASIN <br /> <br />06706000 NORTH FORK SOUTH PLATTE RIVER BELOW GENEVA CREEK, AT GRANT, CO <br /> <br />LOCATION.--Lat 39°27'26", long 105°39'29" in NW¼ sec. 10, T.7 S., R.74 W., Park County, Hydrologic Unit <br />10190002, on left bank at Grant, 1,550 ft downstream from Geneva Creek, and 1.3 mi downstream from <br />east portal of Harold D. Roberts tunnel. <br /> <br />DRAINAGE AREA AND PERIOD OF RECORD.--127 mi²; 1948 to present. <br /> <br />GAGE.--A graphic water stage recorder and satellite monitoring equipment in a wooden shelter over a <br />concrete well at a concrete trapezoidal channel section and spillway. The gage has power and is <br />equipped with heat lamps and tapes to prevent freezing of the stilling well and intakes. The <br />station is owned and maintained by the Denver Water Department. The satellite equipment is owned by <br />USCOE and maintained by the USGS. <br /> <br />REMARKS.--The primary record is hourly data taken from satellite monitoring with chart back up. It is <br />complete. The shaft encoder was accurate to ± 0.02 ft. The record is reliable. All missing values <br />were filled in using chart data. Rapid changes in stage are caused by the regulation of Roberts <br />Tunnel, ½ mile upstream. When Roberts tunnel is operating, the gage is free from ice. The record <br />is good. Station maintained and record developed by Garver Brown. <br /> <br />RATING TABLE.--PLAGRACO12 USED FROM 01-OCT-2003 TO 30-SEP-2004 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 297 160 93 58 57 98 167 109 267 131 51 192 <br /> 2 299 161 81 59 57 108 189 104 264 114 51 245 <br /> 3 247 143 76 59 62 121 190 109 292 108 51 267 <br /> 4 193 110 75 59 67 124 189 118 326 105 49 268 <br /> 5 193 100 74 59 70 126 166 130 335 103 52 244 <br /> 6 251 105 75 59 77 124 148 143 343 149 97 220 <br /> 7 292 136 76 61 82 126 145 145 372 188 137 216 <br /> 8 320 157 77 61 82 128 145 142 399 221 135 230 <br /> 9 339 157 76 61 87 139 115 133 440 242 132 231 <br /> 10 339 145 75 61 93 153 88 142 477 243 129 228 <br /> 11 338 132 75 61 95 157 87 135 469 209 150 228 <br /> 12 338 129 75 60 95 159 88 117 463 179 174 225 <br /> 13 294 130 74 60 95 161 88 109 397 179 175 225 <br /> 14 264 130 75 59 95 161 90 104 352 215 172 224 <br /> 15 298 126 71 59 95 169 90 99 333 249 170 225 <br /> 16 319 134 64 59 95 171 135 97 310 253 171 216 <br /> 17 321 149 61 59 95 171 225 97 313 210 171 151 <br /> 18 318 144 61 59 98 191 273 97 273 104 174 106 <br /> 19 336 149 61 59 98 205 249 129 195 91 185 106 <br /> 20 402 150 61 59 98 208 168 209 187 122 178 104 <br /> 21 453 123 61 59 98 210 132 250 238 188 174 111 <br /> 22 362 92 61 59 98 190 131 298 248 284 173 104 <br /> 23 286 84 61 59 98 178 131 283 176 327 204 95 <br /> 24 290 93 59 58 98 170 131 278 217 346 221 96 <br /> 25 241 97 59 57 98 160 133 274 332 303 222 97 <br /> 26 198 95 59 57 98 137 132 235 381 200 185 99 <br /> 27 177 94 59 57 97 120 135 209 282 83 164 88 <br /> 28 164 96 59 57 98 93 139 259 132 65 164 82 <br /> 29 163 99 58 57 98 78 138 311 69 63 161 83 <br /> 30 163 100 57 57 --- 80 132 320 104 58 161 84 <br /> 31 159 --- 58 57 --- 116 --- 294 --- 57 161 --- <br /> <br />TOTAL 8654 3720 2107 1825 2574 4532 4369 5479 8986 5389 4594 5090 <br />MEAN 279 124 68 59 89 146 146 177 300 174 148 170 <br />AC-FT 17170 7380 4180 3620 5110 8990 8670 10870 17820 10690 9110 10100 <br />MAX 453 161 93 61 98 210 273 320 477 346 222 268 <br />MIN 159 84 57 57 57 78 87 97 69 57 49 82 <br /> <br />WTR YR 2004 TOTAL 57319 MEAN 157 MAX 477 MIN 49 AC-FT 113700 <br /> <br />MAX DISCH: 482 CFS AT 21:00 ON Jun. 9, 2004 GH 1.68 FT. SHIFT 0 FT. <br />MAX GH: 1.68 FT. AT 21:00 ON Jun. 9, 2004 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br />0 <br />200 <br />400 <br />600 <br />Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep