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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.--Primary record is hourly readings, taken from satellite monitoring of the both the stilling well <br />and Accubar, with chart back-up on the well. The well became isolated when the stage dropped below <br />about 1.7 ft, which at very low flows can occur during a daily diurnal as Metro Wastewater flows <br />pass the gage. A new rock control installed in March of 2002. The record is rated as fair from <br />October 1 to March 10. The record was estimated from March 11 to April 15. The record is rated as <br />good from April 16 to September 30. The peak of September 12 is also considered fair due to lack of <br />confirming measurements made above 2,530 cfs. Station maintained and record developed by Lee <br />Cunning. <br /> <br />RATING TABLE.--PLAHENCO31 USED FROM 01-OCT-2001 TO 17-MAR-2002 <br /> PLAHENCO32 USED FROM 16-APR-2002 TO 03-OCT-2002 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 292 439 275 248 219 476 119 212 235 194 131 152 <br /> 2 278 462 276 254 218 493 120 242 254 188 131 149 <br /> 3 296 363 269 252 220 541 108 238 268 199 125 155 <br /> 4 299 349 265 244 218 618 114 231 717 199 124 147 <br /> 5 363 357 261 253 208 564 120 218 271 182 142 139 <br /> 6 374 317 267 253 192 360 167 232 204 530 275 141 <br /> 7 384 273 261 253 203 363 181 224 174 308 156 142 <br /> 8 395 433 262 248 203 387 173 216 142 212 141 152 <br /> 9 404 307 262 259 185 471 159 208 188 201 137 166 <br /> 10 419 339 269 273 193 494 216 217 238 299 139 336 <br /> 11 426 291 269 275 235 433 275 218 241 509 128 249 <br /> 12 424 291 267 264 300 342 278 362 258 209 129 770 <br /> 13 428 290 268 250 296 347 286 289 250 202 127 1070 <br /> 14 445 281 265 239 293 392 286 247 232 185 127 429 <br /> 15 481 270 258 236 314 333 297 240 220 180 125 227 <br /> 16 444 284 267 245 352 329 300 255 220 170 119 173 <br /> 17 422 269 297 249 368 322 269 389 263 171 113 167 <br /> 18 402 276 279 257 374 295 257 271 231 165 112 169 <br /> 19 407 296 267 246 400 277 254 246 212 150 120 541 <br /> 20 404 284 269 245 378 226 254 239 359 154 119 271 <br /> 21 400 283 264 245 379 190 241 239 270 131 121 223 <br /> 22 416 290 252 246 378 192 238 254 351 150 185 208 <br /> 23 431 433 251 242 429 194 213 225 248 139 175 213 <br /> 24 432 351 256 247 427 190 201 2160 217 127 157 201 <br /> 25 420 312 233 244 457 202 197 638 205 121 148 191 <br /> 26 406 320 235 253 469 185 205 285 199 141 144 220 <br /> 27 406 313 249 235 467 173 208 222 204 136 136 214 <br /> 28 400 300 249 247 468 165 215 208 190 133 197 210 <br /> 29 421 264 247 242 --- 147 220 182 210 138 394 204 <br /> 30 445 276 246 217 --- 155 205 178 204 136 479 210 <br /> 31 439 --- 255 221 --- 146 --- 201 --- 134 203 --- <br /> <br />TOTAL 12403 9613 8110 7682 8843 10002 6376 9786 7475 6093 5059 7839 <br />MEAN 400 320 262 248 316 323 213 316 249 197 163 261 <br />AC-FT 24600 19070 16090 15240 17540 19840 12650 19410 14830 12090 10030 15550 <br />MAX 481 462 297 275 469 618 300 2160 717 530 479 1070 <br />MIN 278 264 233 217 185 146 108 178 142 121 112 139 <br /> <br />WTR YR 2002 TOTAL 99281 MEAN 272 MAX 2160 MIN 108 AC-FT 196900 <br /> <br />MAX DISCH: 4670 CFS AT 22:15 ON Sep. 12, 2002 GH 7.42 FT. SHIFT 0.03 FT. <br />MAX GH: 7.42 FT. AT 22:15 ON Sep. 12, 2002 <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br />0 <br />1000 <br />2000 <br />3000 <br />Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep <br />