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16 <br /> <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 <br />Unit 10190003, on right bank 500 ft upstream from bridge on State Highway 22 and 0.2 mi northwest of <br />Henderson. <br /> <br />PERIOD OF RECORD AND DRAINAGE AREA.--4,713 mi². May 1926 to current year. Monthly data only prior to <br />1933. Periodic water quality data available starting in 1955. <br /> <br />GAGE.--Water-stage recorder with satellite telemetry, shaft encoder and Telemark in a 42-inch metal pipe <br />shelter with electric drop tape and outside wire weight as additional reference. An Accubar was <br />installed April 25, 1997 and run in parallel with the shaft encoder. The Accubar is used as primary <br />record during periods of low flows when the well becomes isolated. <br /> <br />REMARKS.--The satellite record is the primary record. Record is complete and reliable. Datum corrections <br />were used to adjust the hourly Accubar record. Chart values were used on the following dates when <br />Accubar and chart did not agree. Oct. 28-29; Nov. 1-27, 28; Dec. 21, 1997; Jan. 16-31; Feb. 1-4; <br />Mar. 18-19; Apr. 8, 26; May 3-4, 6-9, 1998. Chart values were also used June 27-29 to fill in <br />missing DCP data. Record is rated as good, except for Jan. 1-15 (fair) when the Accubar and the <br />chart recorder both had corrections applied. Station maintained and record developed by Brent <br />Schantz. <br /> <br />RATING TABLE.--PLAHENCO30 USED FROM 01-OCT-1997 TO 30-SEP-1998 <br /> <br />DISCHARGE, IN CFS, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 472 519 410 543 495 329 550 1520 1230 627 919 722 <br /> 2 473 453 407 550 501 334 823 1360 1050 657 1310 482 <br /> 3 470 422 462 551 478 336 1960 1340 943 618 1300 516 <br /> 4 467 400 579 556 472 337 1330 1340 1030 591 1790 439 <br /> 5 458 384 493 545 366 346 1010 2120 1570 579 1530 345 <br /> 6 453 406 450 595 339 343 975 2390 1010 634 1070 382 <br /> 7 438 422 456 597 324 413 1030 3780 853 852 771 473 <br /> 8 467 379 494 568 329 448 1050 2990 1250 830 523 431 <br /> 9 514 438 538 540 317 404 793 3490 1300 1160 531 287 <br /> 10 456 461 526 522 314 351 808 2210 1070 1280 548 270 <br /> 11 444 416 487 536 309 301 732 2070 750 1800 674 298 <br /> 12 997 427 418 544 301 292 700 2120 519 1310 388 281 <br /> 13 760 433 418 535 305 310 698 1990 495 1070 386 466 <br /> 14 554 416 463 527 310 304 819 1900 745 730 599 423 <br /> 15 461 433 502 529 310 278 1040 1780 1070 370 762 309 <br /> 16 401 415 465 519 351 261 1300 1650 510 480 723 299 <br /> 17 394 422 489 525 342 269 1240 1470 422 585 598 299 <br /> 18 368 422 489 519 320 713 2450 1360 385 519 555 312 <br /> 19 356 427 461 522 316 1250 1570 1020 355 413 660 303 <br /> 20 397 449 445 519 312 1010 1180 857 346 436 810 309 <br /> 21 484 411 444 507 313 748 1170 695 587 456 461 298 <br /> 22 478 406 443 501 316 659 1070 1000 753 800 591 509 <br /> 23 464 425 533 489 317 632 1150 2010 711 1810 605 303 <br /> 24 1050 427 575 478 315 617 1270 1420 467 1130 579 316 <br /> 25 869 427 539 507 315 602 1380 1400 397 2010 544 281 <br /> 26 1050 416 533 484 330 569 3030 1440 407 3570 516 277 <br /> 27 1520 411 541 484 326 652 1740 1490 503 1400 508 273 <br /> 28 1520 832 533 484 327 671 1750 1390 561 1040 494 283 <br /> 29 1100 572 555 484 --- 676 1790 1410 551 1020 440 283 <br /> 30 742 433 577 478 --- 828 1830 1290 557 1160 430 279 <br /> 31 631 --- 559 495 --- 759 --- 1280 --- 1640 415 --- <br /> <br /> TOTAL 19708 13304 15284 16233 9670 16042 38238 53582 22397 31577 22030 10748 <br /> MEAN 636 443 493 524 345 517 1275 1728 747 1019 711 358 <br /> AC-FT 39090 26390 30320 32200 19180 31820 75850 106300 44420 62630 43700 21320 <br /> MAX 1520 832 579 597 501 1250 3030 3780 1570 3570 1790 722 <br /> MIN 356 379 407 478 301 261 550 695 346 370 386 270 <br /> <br /> CAL YR 1997 TOTAL 239155 MEAN 655 MAX 4650 MIN 31 AC-FT 474400 <br /> WTR YR 1998 TOTAL 268813 MEAN 736 MAX 3780 MIN 261 AC-FT 533200 <br /> <br /> MAX DISCH 9363 CFS AT 0145 26-JUL-1998 GH 8.81 FT. SHIFT 0.14 FT. MAX GH 8.81 FT. AT 0145 26-JUL-1998 <br /> <br /> FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br />0 <br />1000 <br />2000 <br />3000 <br />4000 <br />OctNovDecJanFebMarAprMayJunJulAugSep