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35 <br />PLATTE RIVER BASIN <br /> <br />06720500 SOUTH PLATTE RIVER AT HENDERSON, CO <br /> <br />LOCATION --Lat 39°55'19", long 104°52'00", in SE¼NE¼ sec. 34, T.l S., R,67 W., Adams County, Hydrologic Unit <br />10190003, on right bank 500 ft upstream from the 124th St. bridge and 0.2 mi northwest of Henderson. <br /> <br />PERIOD OF RECORD AND DRAINAGE AREA.--4,768 mi². May 1926 to current year. Monthly data only prior to 1933. <br />Periodic water quality data available starting in 1955. <br /> <br />GAGE.--Data Collection Platform (DCP) with a shaft encoder and a continuous chart recorder in a 42-inch metal <br />pipe shelter and well at a grouted rock grade control structure. The primary reference gage is an <br />electric tape gage with a supplemental outside wire weight gage. Water quality instrumentation <br />installed by other agencies. Datum of gage, formerly 4999.12 ft. MSL, (NAVD 1929), revised by survey to <br />5001.25 ft MSL (NAVD 1988). <br /> <br />REMARKS.--The primary record is hourly averages of 15-minute satellite data with chart backup. The shaft <br />encoder remained in good calibration verified by 24 visits and requiring one minor adjustment. The <br />record is complete and reliable. Record is good. Station maintained Jana Ash and Patrick Tyler and <br />record developed by Jana Ash. <br /> <br />RATING TABLE.--PLAHENCO33 USED FROM 01-Oct-2007 TO 30-Sep-2008 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2007 TO SEPTEMBER 2008 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 200 373 313 175 281 287 220 637 464 1010 408 369 <br /> 2 216 373 292 182 276 381 206 572 490 901 395 229 <br /> 3 251 374 260 185 277 390 228 388 958 884 316 280 <br /> 4 199 378 201 210 271 345 243 324 939 905 297 269 <br /> 5 177 396 190 281 299 388 206 317 1270 925 406 272 <br /> 6 168 421 192 325 385 464 169 335 726 983 631 274 <br /> 7 170 443 197 240 406 589 204 877 415 1110 932 258 <br /> 8 193 427 204 208 389 525 160 365 459 880 416 263 <br /> 9 185 447 209 210 362 310 131 414 335 903 1250 276 <br /> 10 201 449 238 205 377 298 602 663 256 847 413 230 <br /> 11 202 452 232 201 352 385 469 455 423 827 400 170 <br /> 12 195 457 234 198 344 430 241 403 503 686 346 1800 <br /> 13 217 459 214 200 360 519 194 1100 443 616 355 654 <br /> 14 641 452 204 206 400 543 188 571 408 571 375 570 <br /> 15 787 463 199 202 406 470 163 681 421 443 1130 379 <br /> 16 357 463 202 201 416 487 145 558 478 390 2810 228 <br /> 17 265 454 205 192 411 565 286 402 569 386 1780 210 <br /> 18 246 467 195 194 431 470 217 320 750 410 623 246 <br /> 19 237 478 194 257 472 438 169 299 767 591 427 253 <br /> 20 243 420 190 269 469 369 162 418 824 549 328 192 <br /> 21 685 512 190 271 448 369 185 460 915 579 286 197 <br /> 22 560 600 186 268 436 282 266 641 969 510 261 177 <br /> 23 322 529 183 264 439 293 370 780 945 443 224 172 <br /> 24 293 481 188 261 456 269 438 568 947 518 221 193 <br /> 25 277 461 174 265 473 254 480 491 1040 483 224 195 <br /> 26 365 442 173 263 475 264 371 414 947 451 260 195 <br /> 27 381 412 184 270 383 269 354 596 901 499 324 189 <br /> 28 390 418 183 244 343 263 348 424 770 510 315 191 <br /> 29 394 418 184 188 309 235 331 435 876 607 359 198 <br /> 30 386 402 191 179 --- 220 370 419 1040 552 358 175 <br /> 31 383 --- 224 210 --- 235 --- 408 --- 514 410 --- <br /> <br />TOTAL 9786 13321 6425 7024 11146 11606 8116 15735 21248 20483 17280 9304 <br />MEAN 316 444 207 227 384 374 271 508 708 661 557 310 <br />AC-FT 19410 26420 12740 13930 22110 23020 16100 31210 42150 40630 34270 18450 <br />MAX 787 600 313 325 475 589 602 1100 1270 1110 2810 1800 <br />MIN 168 373 173 175 271 220 131 299 256 386 221 170 <br /> <br />CAL YR 2007 TOTAL 300303 MEAN 823 MAX 4410 MIN 168 AC-FT 595700 <br />WTR YR 2008 TOTAL 151474 MEAN 414 MAX 2810 MIN 131 AC-FT 300400 <br /> <br />MAX DISCH: 5690 CFS AT 18:00 ON Aug. 16, 2008 GH 8.37 FT. SHIFT 0.07 FT. <br />MAX GH: 8.37 FT. AT 18:00 ON Aug. 16, 2008 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br /> <br />