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17 <br />PLATTE RIVER BASIN <br /> <br />06707500 SOUTH PLATTE RIVER AT SOUTH PLATTE, CO <br /> <br />LOCATION.--Lat 39°24'32", long 105°10'12", 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 60-inch CMP well. The primary gage is an electric tape gage mounted on the <br />equipment shelf. 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 29-30, December 1-7, 22, 2006, January 9-31, and February 1-6, 2007. These time periods were <br />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 periods of ice affected record, which are estimated and considered poor. Station maintained and <br />record developed by Steve Barrett. <br /> <br />RATING TABLE.--PLASPLCO16 USED FROM 01-OCT-2006 TO 30-SEPT-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 /> 1 655 265 262 201 152 197 727 1490 1370 1460 873 721 <br /> 2 638 661 206 202 186 193 680 1520 1360 1430 847 675 <br /> 3 584 700 185 211 253 204 598 1430 1410 1410 943 578 <br /> 4 535 551 235 227 257 219 564 1390 1370 1360 962 560 <br /> 5 526 448 214 213 238 223 559 1370 1420 1310 1040 566 <br /> 6 514 374 177 167 192 224 558 1390 1470 1220 1080 589 <br /> 7 492 353 150 177 202 266 549 1410 1410 1160 1260 550 <br /> 8 492 332 168 196 207 272 541 1420 1360 1150 1350 548 <br /> 9 503 294 238 199 210 277 537 1460 1360 1120 1340 451 <br /> 10 498 291 230 201 211 339 529 1500 1340 1090 1300 439 <br /> 11 427 344 241 213 219 346 490 1570 1330 1110 1280 432 <br /> 12 407 384 231 203 230 358 443 1570 1390 1190 1230 421 <br /> 13 414 365 221 246 233 389 445 1550 1470 1290 1050 441 <br /> 14 368 336 252 233 222 431 400 1570 1380 1230 846 534 <br /> 15 371 292 249 241 222 462 421 1620 1380 1200 848 590 <br /> 16 355 288 242 246 239 486 419 1580 1380 1120 889 583 <br /> 17 447 306 235 246 238 520 455 1660 1400 917 795 563 <br /> 18 477 298 227 234 232 585 459 1640 1400 915 830 491 <br /> 19 464 290 219 207 242 605 469 1730 1340 856 900 448 <br /> 20 384 289 233 235 238 651 521 1830 1320 936 901 477 <br /> 21 348 287 224 204 227 740 548 1830 1300 1020 850 595 <br /> 22 361 293 277 219 231 778 551 1850 1320 1130 813 689 <br /> 23 355 291 274 227 221 785 550 1740 1410 1060 822 768 <br /> 24 370 273 285 210 224 842 658 1730 1420 963 833 750 <br /> 25 388 272 290 156 208 861 715 1640 1430 950 809 613 <br /> 26 409 267 299 155 220 874 759 1580 1440 1040 765 523 <br /> 27 433 253 269 178 225 843 854 1510 1380 1040 693 483 <br /> 28 472 268 262 181 233 839 1030 1490 1360 1030 548 485 <br /> 29 485 293 220 188 --- 810 1270 1500 1500 942 561 498 <br /> 30 428 238 223 180 --- 760 1420 1450 1520 920 603 497 <br /> 31 337 --- 184 175 --- 749 --- 1370 --- 897 680 --- <br /> <br />TOTAL 13937 10196 7222 6371 6212 16128 18719 48390 41740 34466 28541 16558 <br />MEAN 450 340 233 206 222 520 624 1561 1391 1112 921 552 <br />AC-FT 27640 20220 14320 12640 12320 31990 37130 95980 82790 68360 56610 32840 <br />MAX 655 700 299 246 257 874 1420 1850 1520 1460 1350 768 <br />MIN 337 238 150 155 152 193 400 1370 1300 856 548 421 <br /> <br />CAL YR 2006 TOTAL 166001 MEAN 455 MAX 1110 MIN 142 AC-FT 329260 <br />WTR YR 2007 TOTAL 248480 MEAN 681 MAX 1850 MIN 150 AC-FT 492900 <br /> <br />MAX DISCH: 1920 CFS AT 07:00 ON May. 20, 2007 GH 5.28 FT. SHIFT -0.08 FT. <br />MAX GH: 5.28 FT. AT 07:00 ON May. 20, 2007 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br />