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33 <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 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 1933. <br />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. MSL, 1929 datum. <br /> <br />REMARKS.--The primary record is fifteen minute data taken from satellite monitoring with chart backup. The <br />encoder remained in good calibration, with few adjustments. The gage was visited 40 times and the <br />encoder had only seven adjustments. One flush correction was applied from June 5, 2005 at 16:00 hrs to <br />June 9, 2005 at 10:30 hrs. This period of record is considered fair to poor. The inlets seemed to be <br />plugged for the period of June 13, 2005 at 07:00 hrs to June 17, 2005 at 13:00 hrs. This period of <br />record should be considered fair to poor. The gage height record is complete. The record is reliable <br />except for the certain periods of plugged inlets discussed above. The new control has created a sand bar <br />moving in the direction of the gage that has been causing the inlets to become buried. The pipe inlets <br />were extended beyond the sand bar on October 18, 2005, which should benefit the record in future years. <br />Record is rated as good, except June 5-9 and June 13-17, which are fair to poor due to partially plugged <br />inlets. Station maintained and record developed by Jana Ash. <br /> <br />RATING TABLE.--PLAHENCO33 USED FROM 01-OCT-2004 TO 30-SEP-2005 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 329 770 293 225 260 369 165 1460 905 465 216 262 <br /> 2 286 516 255 222 213 357 143 1080 992 503 204 253 <br /> 3 247 366 214 207 200 336 137 620 1130 604 342 236 <br /> 4 245 243 219 196 194 337 157 660 3430 557 3510 244 <br /> 5 238 234 220 183 197 261 226 865 1980 470 1490 254 <br /> 6 976 226 221 186 189 259 308 730 1310 472 639 277 <br /> 7 387 224 207 201 188 254 352 527 1090 452 307 287 <br /> 8 276 215 201 202 189 241 250 486 909 499 311 259 <br /> 9 257 215 228 214 197 219 256 545 937 580 373 252 <br /> 10 247 230 293 211 191 155 837 785 1930 599 427 289 <br /> 11 245 269 292 195 193 158 1790 1490 2040 523 456 290 <br /> 12 239 229 284 204 198 148 1110 1550 2210 413 574 296 <br /> 13 715 215 288 214 192 232 1060 1060 1750 367 480 290 <br /> 14 326 212 306 203 194 214 792 779 1450 355 612 322 <br /> 15 267 219 311 195 193 189 640 753 1080 336 462 381 <br /> 16 463 211 301 200 202 175 541 546 863 450 445 234 <br /> 17 440 209 307 198 195 179 497 449 654 308 373 224 <br /> 18 397 203 290 197 230 141 480 541 607 298 287 221 <br /> 19 375 205 287 199 274 131 543 516 613 311 292 206 <br /> 20 400 219 288 201 269 132 666 457 689 304 349 190 <br /> 21 416 235 279 192 271 217 1320 568 827 264 374 188 <br /> 22 421 266 278 186 264 137 1060 623 774 240 348 191 <br /> 23 395 303 278 193 269 105 785 760 733 220 223 205 <br /> 24 389 298 276 201 262 252 489 1080 763 226 471 210 <br /> 25 395 291 266 200 261 269 1660 972 873 387 358 202 <br /> 26 379 265 273 192 275 169 1100 590 830 755 316 211 <br /> 27 362 273 288 193 362 164 1090 519 791 586 346 205 <br /> 28 353 281 295 199 386 168 1210 428 589 369 246 246 <br /> 29 358 291 263 193 --- 235 1020 409 553 309 252 304 <br /> 30 369 294 218 224 --- 255 1370 690 472 288 275 270 <br /> 31 377 --- 237 262 --- 325 --- 1300 --- 241 268 --- <br /> <br />TOTAL 11569 8227 8256 6288 6508 6783 22054 23838 33774 12751 15626 7499 <br />MEAN 373 274 266 203 232 219 735 769 1126 411 504 250 <br />AC-FT 22950 16320 16380 12470 12910 13450 43740 47280 66990 25290 30990 14870 <br />MAX 976 770 311 262 386 369 1790 1550 3430 755 3510 381 <br />MIN 238 203 201 183 188 105 137 409 472 220 204 188 <br /> <br />WTR YR 2005 TOTAL 163173 MEAN 447 MAX 3510 MIN 105 AC-FT 323700 <br /> <br />MAX DISCH: 6060 CFS AT 19:15 ON Aug. 4, 2005 GH 8.58 FT. SHIFT 0.04 FT. <br />MAX GH: 8.58 FT. AT 19:15 ON Aug. 4, 2005 <br />