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16 <br />PLATTE RIVER BASIN <br />06720500 SOUTH PLATTE RIVER AT HENDERSON, CO <br />LOCATION --Lat 3905511911, long 10405210011, in SE1,ANE%1 sec. 34, T.1 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 />PERIOD <br />OF RECORD AND DRAINAGE AREA. --4,713 mit. <br />May 1926 <br />to current year. Monthly data only <br />prior to <br />1933. <br />Periodic water <br />quality <br />data <br />available starting <br />in 1955. <br />GAGE.--Water-stage <br />recorder with satellite telemetry, <br />shaft <br />encoder <br />and <br />Telemark in a 42 -inch <br />metal <br />pipe <br />shelter <br />with electric drop <br />tape and outside wire weight as <br />additional <br />reference. <br />An Accubar <br />was <br />installed <br />April 25, <br />1997 and <br />run in <br />parallel <br />with the <br />shaft encoder. The Accubar is <br />used as <br />primary <br />record <br />during periods <br />of low <br />flows <br />when the <br />well becomes isolated. <br />REMARKS. <br />--Primary record <br />is hourly <br />readings, taken from satellite <br />monitoring <br />of <br />the stilling well and <br />Accubar <br />with chart back-up <br />on the <br />well. The record <br />is reliable <br />except for <br />the following <br />period: <br />March 30 <br />and September 17, when there was no DCP/Accubar data <br />and <br />the chart <br />record <br />did not <br />reflect <br />the actual stage <br />(The well <br />was isolated.). <br />These days <br />were <br />estimated using <br />the stage pattern <br />from <br />the previous <br />day. <br />Record is rated <br />as good, <br />except for flows <br />above 657 CFS <br />(including the <br />recorded <br />peak flow) which <br />are fair <br />due to <br />lack of <br />confirming <br />measurements <br />made this <br />year <br />above <br />657 CFS. <br />Station <br />maintained <br />and record <br />developed <br />by Brent Schantz. <br />RATING <br />TABLE.--PLAHENC031 <br />USED FROM <br />01 -OCT -1999 TO 30 <br />-SEP -2000 <br />DISCHARGE, <br />IN CFS, <br />WATER YEAR OCTOBER <br />1999 TO <br />SEPTEMBER 2000 <br />MEAN <br />VALUES <br />DAY <br />OCT <br />NOV <br />DEC <br />JAN <br />FEB <br />MAR <br />APR <br />MAY <br />JUN <br />JUL <br />AUG <br />SEP <br />1 <br />531 <br />558 <br />258 <br />556 <br />487 <br />331 <br />855 <br />460 <br />535 <br />589 <br />329 <br />381 <br />2 <br />517 <br />568 <br />243 <br />550 <br />484 <br />336 <br />763 <br />226 <br />445 <br />615 <br />331 <br />241 <br />3 <br />536 <br />598 <br />281 <br />582 <br />493 <br />375 <br />874 <br />186 <br />398 <br />572 <br />329 <br />273 <br />4 <br />509 <br />603 <br />305 <br />567 <br />374 <br />344 <br />467 <br />224 <br />401 <br />534 <br />336 <br />268 <br />5 <br />545 <br />606 <br />285 <br />550 <br />359 <br />349 <br />333 <br />332 <br />415 <br />505 <br />352 <br />257 <br />6 <br />456 <br />598 <br />279 <br />527 <br />358 <br />351 <br />333 <br />372 <br />382 <br />477 <br />323 <br />227 <br />7 <br />449 <br />596 <br />267 <br />508 <br />351 <br />359 <br />323 <br />365 <br />458 <br />432 <br />330 <br />226 <br />8 <br />434 <br />595 <br />273 <br />513 <br />345 <br />368 <br />335 <br />884 <br />439 <br />436 <br />323 <br />207 <br />9 <br />418 <br />591 <br />274 <br />508 <br />346 <br />323 <br />303 <br />920 <br />420 <br />427 <br />297 <br />195 <br />10 <br />415 <br />598 <br />256 <br />520 <br />360 <br />306 <br />292 <br />433 <br />502 <br />490 <br />276 <br />187 <br />11 <br />417 <br />603 <br />252 <br />502 <br />364 <br />300 <br />277 <br />421 <br />485 <br />545 <br />266 <br />176 <br />12 <br />452 <br />593 <br />238 <br />508 <br />373 <br />290 <br />239 <br />405 <br />452 <br />497 <br />260 <br />170 <br />13 <br />415 <br />573 <br />240 <br />496 <br />364 <br />285 <br />217 <br />358 <br />382 <br />567 <br />282 <br />174 <br />14 <br />453 <br />556 <br />246 <br />490 <br />364 <br />276 <br />208 <br />392 <br />428 <br />491 <br />314 <br />176 <br />15 <br />533 <br />550 <br />225 <br />490 <br />364 <br />336 <br />242 <br />350 <br />388 <br />598 <br />283 <br />171 <br />16 <br />652 <br />519 <br />222 <br />496 <br />361 <br />655 <br />303 <br />314 <br />503 <br />518 <br />356 <br />172 <br />17 <br />873 <br />509 <br />246 <br />520 <br />362 <br />549 <br />234 <br />938 <br />921 <br />4090 <br />1400 <br />173 <br />18 <br />674 <br />515 <br />236 <br />514 <br />386 <br />437 <br />221 <br />1970 <br />531 <br />1010 <br />2090 <br />180 <br />19 <br />678 <br />510 <br />239 <br />509 <br />383 <br />341 <br />260 <br />796 <br />456 <br />413 <br />456 <br />185 <br />20 <br />612 <br />520 <br />228 <br />520 <br />359 <br />414 <br />251 <br />466 <br />788 <br />465 <br />274 <br />703 <br />21 <br />577 <br />541 <br />417 <br />527 <br />355 <br />619 <br />234 <br />453 <br />512 <br />467 <br />245 <br />323 <br />22 <br />569 <br />848 <br />507 <br />530 <br />359 <br />560 <br />242 <br />432 <br />504 <br />430 <br />294 <br />267 <br />23 <br />532 <br />527 <br />551 <br />515 <br />476 <br />457 <br />315 <br />465 <br />529 <br />436 <br />299 <br />328 <br />24 <br />528 <br />339 <br />568 <br />512 <br />515 <br />433 <br />302 <br />576 <br />514 <br />423 <br />287 <br />680 <br />25 <br />523 <br />277 <br />531 <br />504 <br />376 <br />432 <br />259 <br />852 <br />573 <br />404 <br />304 <br />361 <br />26 <br />500 <br />273 <br />526 <br />552 <br />365 <br />403 <br />233 <br />761 <br />1030 <br />374 <br />498 <br />304 <br />27 <br />477 <br />278 <br />568 <br />722 <br />348 <br />273 <br />272 <br />434 <br />939 <br />335 <br />417 <br />298 <br />28 <br />466 <br />263 <br />585 <br />649 <br />365 <br />250 <br />262 <br />334 <br />689 <br />313 <br />472 <br />289 <br />29 <br />476 <br />264 <br />605 <br />544 <br />348 <br />343 <br />287 <br />368 <br />481 <br />305 <br />785 <br />279 <br />30 <br />495 <br />261 <br />606 <br />517 <br />--- <br />289 <br />968 <br />526 <br />441 <br />323 <br />507 <br />315 <br />31 <br />504 <br />--- <br />579 <br />506 <br />--- <br />826 <br />--- <br />566 <br />--- <br />332 <br />277 <br />--- <br />TOTAL <br />16216 <br />15230 <br />11136 16504 <br />11144 <br />12210 10704 <br />16579 <br />15941 <br />18413 <br />13592 <br />8186 <br />MEAN <br />523 <br />508 <br />359 <br />532 <br />384 <br />394 <br />357 <br />535 <br />531 <br />594 <br />438 <br />273 <br />AC -FT <br />32160 <br />30210 <br />22090 32740 <br />22100 <br />24220 21230 <br />32880 <br />31620 <br />36520 <br />26960 <br />16240 <br />MAX <br />873 <br />848 <br />606 <br />722 <br />515 <br />826 <br />968 <br />1970 <br />1030 <br />4090 <br />2090 <br />703 <br />MIN <br />415 <br />261 <br />222 <br />490 <br />345 <br />250 <br />208 <br />186 <br />382 <br />305 <br />245 <br />170 <br />CAL YR <br />1999 <br />TOTAL <br />0 MEAN <br />0 MAX <br />0 <br />MIN <br />0 <br />AC -FT <br />0 <br />WTR YR <br />2000 <br />TOTAL 165855 MEAN <br />453 MAX <br />4090 <br />MIN <br />170 <br />AC -FT <br />329000 <br />MAX DISCH: <br />8460 <br />CFS AT 04:45 ON Jul. 17, <br />2000 GH <br />8.58 FT. <br />SHIFT <br />0.04 FT. <br />MAX GH: <br />8.58 FT. <br />AT 04:45 ON Jul. <br />17, 2000 <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br />6000 <br />4000 <br />2000 <br />0 <br />Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep <br />