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15 <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.--4,768 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 phone modem in a 42-inch metal pipe <br />shelter with electric drop tape and outside wire weight as additional reference. Water quality <br />instrumentation installed by other agencies. Datum of gage is 4999.12 ft. above mean sea level, <br />datum of 1929. <br /> <br />REMARKS.--Primary record is hourly readings, taken from satellite monitoring of the stilling well with <br />chart back up on the well. The gage was visited 42 times and the encoder had only three <br />adjustments. The entire year record is Shaft Encoder record, and maximum/minimum from the primary <br />printout were checked to within +/- .02 against well chart. The gage height record is complete. <br />The record is reliable except for certain periods of plugged inlets. Record is rated as good, except <br />for the following days: October 7-9, February 20-24, May 23-24, June 28-29, and July 25-26 are <br />estimated and poor due to inlet problems and October 15, May 21-22, June 30-July 1, and July 24 are <br />considered fair due to inlet problems. Station maintained and record developed by Jana Ash. <br />RATING TABLE.--PLAHENCO33 USED FROM 01-OCT-2003 TO 30-SEP-2004 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 117 198 207 167 228 407 121 782 231 479 412 244 <br /> 2 116 199 213 175 199 364 123 438 255 554 476 212 <br /> 3 114 222 189 180 187 368 731 282 256 358 343 252 <br /> 4 110 213 188 188 180 405 257 179 246 353 381 282 <br /> 5 96 158 216 185 190 677 153 148 243 335 412 438 <br /> 6 122 151 195 170 190 491 202 152 357 429 599 341 <br /> 7 127 158 190 178 193 393 305 245 481 447 645 307 <br /> 8 127 152 199 181 197 378 385 322 377 405 664 270 <br /> 9 125 158 210 198 195 360 550 295 1030 524 498 229 <br /> 10 140 187 222 178 293 320 925 311 771 570 389 205 <br /> 11 136 194 206 184 350 314 709 363 534 405 981 208 <br /> 12 141 196 195 181 341 296 678 841 372 444 490 203 <br /> 13 141 192 191 174 338 282 393 1490 322 391 361 197 <br /> 14 140 190 196 177 340 290 291 586 337 354 344 200 <br /> 15 147 180 210 177 344 290 277 393 339 307 339 224 <br /> 16 145 184 196 176 344 270 206 226 352 568 319 220 <br /> 17 140 190 198 174 339 252 226 178 490 1420 298 217 <br /> 18 134 191 199 175 354 247 249 161 1130 873 1390 203 <br /> 19 133 191 195 180 351 255 264 151 1070 800 4490 178 <br /> 20 141 194 188 196 436 243 216 179 477 547 786 177 <br /> 21 138 193 183 189 368 256 269 208 613 350 432 621 <br /> 22 136 202 188 179 387 226 422 199 806 311 303 860 <br /> 23 139 198 187 175 371 200 1260 230 386 991 296 426 <br /> 24 144 209 188 174 351 203 639 260 319 2370 350 338 <br /> 25 150 212 165 174 343 194 311 260 307 1520 366 333 <br /> 26 152 204 164 181 341 190 259 238 333 453 345 356 <br /> 27 158 209 177 189 339 155 206 213 530 304 1430 373 <br /> 28 161 185 170 195 329 158 195 197 1420 513 812 910 <br /> 29 159 181 169 258 436 186 196 199 675 829 305 379 <br /> 30 160 184 172 254 --- 172 478 253 505 725 247 281 <br /> 31 187 --- 186 247 --- 158 --- 226 --- 491 262 --- <br /> <br />TOTAL 4276 5675 5952 5809 8854 9000 11496 10205 15564 19420 19765 9684 <br />MEAN 138 189 192 187 305 290 383 329 519 626 638 323 <br />AC-FT 8480 11260 11810 11520 17560 17850 22800 20240 30870 38520 39200 19210 <br />MAX 187 222 222 258 436 677 1260 1490 1420 2370 4490 910 <br />MIN 96 151 164 167 180 155 121 148 231 304 247 177 <br /> <br />WTR YR 2004 TOTAL 125700 MEAN 343 MAX 4490 MIN 96 AC-FT 249300 <br /> <br />MAX DISCH: 9050 CFS AT 01:30 ON Aug. 19, 2004 GH 9.98 FT. SHIFT 0 FT. DATUM CORRECTION –0.02 FT. <br />MAX GH: 9.98 FT. AT 01:30 ON Aug. 19, 2004 <br /> <br />0 <br />2000 <br />4000 <br />6000 <br />Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep <br /> <br /> <br />