DWR_2668988

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 2003
• Document Type - Publications and Reports: Streamflow Report

PLATTE RIVER BASIN

06758500 SOUTH PLATTE RIVER NEAR WELDONA, CO

LOCATION.--Lat 40°19'16", long 103°55'10", in SW¼SW¼ sec. 7, T.4 N., R.58 W., Morgan County, Hydrologic
Unit 10190003, on left bank 875 ft downstream from bridge on State Highway 144, 2.8 mi southeast of
Weldona, and 4.2 mi upstream from Bijou Creek.

DRAINAGE AREA AND PERIOD OF RECORD.--13,190 mi². October 1952 to current year.

GAGE.--Graphic water-stage recorder and satellite monitoring equipment in a corrugated metal pipe and
stilling well. The satellite equipment is a Sutron 8004 with digital shaft encoder. An electric
tape inside the station references the gage. A new station was installed and operation began on May
2, 1991.

REMARKS.--The primary record is hourly data taken from satellite monitoring with chart back up. The record
is complete and reliable. Mean gage heights from the chart were used October 27, 2002, and April
6, 2003 to compute discharge on daylight savings time days. Chart values were also used October 31,
November 1-2, January 21-27, August 18-19 and 26-29, when the satellite values were not being
transmitted. All satellite data used agreed with the mean gage heights taken from the chart to
within ±0.02 feet. Only 2 small datum corrections were required during the entire year. They were
applied to the record. Record is considered fair because of all the shifting sand. There was one
estimated day, March 14, 2003 when there was a flush correction. A mild winter resulted in no ice.
Station maintained and record developed by George Sievers.

RATING TABLE.--MULTIPLE CHANGES THROUGHOUT YEAR; SEE DAILY RECORD

DISCHARGE, IN CFS, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 163 614 133 152 214 226 523 404 1220 183 189 1110
2 198 321 123 148 216 220 530 537 2060 235 176 1440
3 208 194 114 146 216 217 526 509 2220 320 142 446
4 202 124 108 142 216 223 506 373 1810 281 176 464
5 314 131 99 147 219 217 494 247 1460 265 233 417
6 337 210 99 146 216 220 443 188 1480 220 244 383
7 282 138 96 146 214 218 364 154 1230 163 220 408
8 248 106 89 147 229 217 299 177 930 145 273 408
9 232 105 84 147 244 217 217 220 1060 190 262 420
10 238 93 81 144 216 216 218 301 785 191 252 457
11 256 91 78 152 211 218 227 880 590 162 282 439
12 254 114 72 146 213 228 227 1880 676 148 297 409
13 240 113 68 142 226 237 222 1270 846 170 297 366
14 242 101 68 143 227 258 219 998 881 221 292 319
15 249 96 68 142 223 253 202 960 818 243 274 333
16 269 90 68 143 222 249 166 944 789 221 258 338
17 284 90 68 146 218 244 212 924 802 215 252 331
18 296 90 68 146 216 200 324 1020 930 206 244 318
19 318 115 67 147 216 191 391 868 1000 205 253 322
20 330 148 73 145 215 345 367 861 1010 198 287 291
21 345 142 68 140 213 401 427 924 1030 244 292 278
22 374 136 67 175 214 314 420 829 807 233 291 271
23 383 131 66 239 216 464 302 564 676 265 211 255
24 408 133 75 213 207 753 502 479 690 301 170 224
25 419 138 76 205 254 852 1080 392 766 297 154 210
26 430 142 123 205 280 733 1230 361 768 285 158 194
27 476 141 188 209 296 524 745 380 648 270 154 172
28 467 142 149 213 241 500 414 366 369 244 161 158
29 520 143 80 213 --- 504 357 388 168 213 165 153
30 556 141 57 214 --- 483 348 638 194 255 175 156
31 573 --- 138 213 --- 444 --- 912 --- 193 258 ---

TOTAL 10111 4473 2811 5156 6308 10586 12502 19948 28713 6982 7092 11490
MEAN 326 149 91 166 225 341 417 643 957 225 229 383
AC-FT 20060 8870 5580 10230 12510 21000 24800 39570 56950 13850 14070 22790
MAX 573 614 188 239 296 852 1230 1880 2220 320 297 1440
MIN 163 90 57 140 207 191 166 154 168 145 142 153

WTR YR 2003 TOTAL 126172 MEAN 346 MAX 2220 MIN 57 AC-FT 250300

MAX DISCH: 2330 CFS AT 01:30 ON Jun. 3, 2003 GH 4.75 FT. SHIFT 0.62 FT.
MAX GH: 4.75 FT. AT 01:30 ON Jun. 3, 2003
FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD.

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