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17 <br />PLATTE RIVER BASIN <br /> <br />06707500 SOUTH PLATTE RIVER AT SOUTH PLATTE, CO <br /> <br />LOCATION.--Lat 39°24'33", long 105°10'10", SE¼ sec. 25, T.7 S., R.70 W., Jefferson County, Hydrologic Unit <br />10190002, on left bank at South Platte, 200 ft downstream from bridge on State Highway 75, and 400 ft <br />downstream from North Fork. <br /> <br />DRAINAGE AREA AND PERIOD OF RECORD.--2,579 mi²; Jan. 1896 to present. <br /> <br />GAGE.--A graphic water stage recorder and satellite monitoring equipment (Sutron 8210 DCP and shaft encoder) in <br />a concrete shelter and CMP well. The primary gage is an electric tape gage mounted on the equipment <br />shelf. The station was rebuilt with a 60” CMP well and concrete shelter in 1994. 120-volt electricity <br />was installed in 2001. The cableway was rebuilt in 1994. The gage is on Denver Water Board property. <br />REMARKS.--The primary record is hourly data taken from satellite readings with chart back up. The record is <br />complete and reliable, except for the following days when ice affected the stage-discharge relationship: <br />November 28 – December 27, 2005; Jan 22, 24 and 25, 2006 and February 16-19, 2006. These time periods <br />were compared to Denver Water Department Inflows into Strontia Reservoir and also compared to trends in <br />releases from Cheeseman Reservoir added to flows at the station at Grant. The record is good, except for <br />the following days: November 28 – December 27, 2005; Jan 22, 24 and 25, 2006 and February 16-19, 2006, <br />which are estimated due to ice effect and considered poor. Station maintained and record developed by <br />Steve Barrett. <br /> <br />RATING TABLE.--PLASPLCO16 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 /> 1 312 222 157 193 150 315 268 322 758 755 626 540 <br /> 2 309 225 180 186 149 311 269 312 768 763 676 498 <br /> 3 310 222 137 190 146 302 268 517 781 775 640 481 <br /> 4 356 220 129 185 148 270 269 567 798 746 575 455 <br /> 5 362 190 131 185 149 269 274 552 800 658 466 396 <br /> 6 364 183 140 212 142 267 279 476 798 787 526 396 <br /> 7 401 191 140 227 149 257 280 454 785 735 591 460 <br /> 8 347 188 148 227 154 216 269 372 806 1080 604 503 <br /> 9 347 162 189 228 171 201 272 432 936 1060 562 426 <br /> 10 341 156 197 246 205 163 276 513 1070 1110 598 294 <br /> 11 240 155 198 252 193 153 307 500 1060 778 680 299 <br /> 12 203 155 198 206 210 162 304 492 1040 692 750 336 <br /> 13 196 151 199 195 204 154 365 562 1000 754 790 338 <br /> 14 195 154 200 204 226 155 448 582 982 1060 797 401 <br /> 15 199 152 200 204 231 239 487 584 965 1020 704 414 <br /> 16 198 126 238 203 207 231 471 628 931 981 590 463 <br /> 17 198 148 280 194 226 238 467 673 926 962 503 461 <br /> 18 234 151 284 202 238 236 439 640 920 983 465 459 <br /> 19 239 162 261 204 239 244 426 670 929 982 676 456 <br /> 20 241 145 236 201 240 240 419 683 916 973 725 458 <br /> 21 237 154 199 185 234 224 429 639 918 1020 655 501 <br /> 22 235 143 184 184 231 195 544 622 927 862 636 487 <br /> 23 231 142 172 184 197 191 553 706 955 828 530 455 <br /> 24 231 142 167 187 205 194 567 691 936 791 537 446 <br /> 25 230 140 156 184 242 232 532 766 964 690 562 445 <br /> 26 232 150 159 164 252 237 442 732 928 817 607 446 <br /> 27 231 142 161 164 299 230 433 754 987 782 602 466 <br /> 28 230 114 165 156 306 237 448 760 948 725 553 514 <br /> 29 229 130 154 158 --- 275 374 753 925 596 536 541 <br /> 30 232 158 155 167 --- 297 325 738 804 575 617 650 <br /> 31 229 --- 201 159 --- 294 --- 751 --- 623 603 --- <br /> <br />TOTAL 8139 4873 5715 6036 5743 7229 11504 18443 27261 25963 18982 13485 <br />MEAN 263 162 184 195 205 233 383 595 909 838 612 450 <br />AC-FT 16140 9670 11340 11970 11390 14340 22820 36580 54070 51500 37650 26750 <br />MAX 401 225 284 252 306 315 567 766 1070 1110 797 650 <br />MIN 195 114 129 156 142 153 268 312 758 575 465 294 <br /> <br />CAL YR 2005 TOTAL 140212 MEAN 384 MAX 1010 MIN 114 AC-FT 278100 <br />WTR YR 2006 TOTAL 153373 MEAN 420 MAX 1110 MIN 114 AC-FT 304200 <br /> <br />MAX DISCH: 1900 CFS AT 02:45 ON Jul. 8, 2006 GH 5.22 FT. SHIFT -0.05 FT. <br />MAX GH: 5.22 FT. AT 02:45 ON Jul. 8, 2006 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br />