DWR_2668867

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 2008
• Document Type - Publications and Reports: Streamflow Report

5
PLATTE RIVER BASIN

06695000 SOUTH PLATTE RIVER ABOVE ELEVENMILE CANYON RESERVOIR NEAR HARTSEL, CO

LOCATION.--Lat 38°58'03", long 105°34'51", in NE¼ sec. 32, T.12 S., R.73 W., Park County, Hydrologic Unit
10190001, on left bank 200 ft downstream from highway bridge, 2.5 mi upstream from water line of
Elevenmile Canyon Reservoir and 13 mi southeast of Hartsel.

DRAINAGE AREA AND PERIOD OF RECORD.--880 mi²; 1933 to present.

GAGE.--Data Collection Platform (DCP), shaft encoder and a continuous chart recorder in a wooden shelter at a 25
ft. Parshall Flume. Primary reference is an electric tape gage with a supplementary outside staff gage.
Gage is maintained by the City of Aurora. Datum of gage is 8,612.83 ft,(Denver Board of Water
Commissioners Datum).

REMARKS.--Primary record is hourly averages of 15-minute satellite data with chart back-up. Record is complete
and reliable, except for December 9-16, 27, 29, 2007, and January 17-31, 2008 when ice in the downstream
channel or ice in the flume affected the stage-discharge relationship. Spinney Reservoir is 2 miles
upstream and releases usually keep this gage open year round. Chart record was used to fill in any
missing satellite data without loss of accuracy. The record is rated good, with the exception of the
ice affected periods, which were estimated from adjacent good record and Spinney release data, and are
considered fair. Station operated and record developed by Mike Wild.

RATING TABLE.--STD25FTPF USED FROM 01-Oct-2007 TO 30-Sep-2008

DISCHARGE, IN CFS, WATER YEAR OCTOBER 2007 TO SEPTEMBER 2008
MEAN VALUES

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

1 89 90 149 76 63 51 39 227 106 387 275 181
2 88 90 149 82 67 51 40 175 111 391 265 172
3 88 89 124 89 65 51 40 153 129 411 246 172
4 89 89 87 89 65 51 40 153 195 420 238 167
5 88 89 76 88 64 51 40 153 236 419 236 156
6 89 89 76 87 65 50 40 124 249 403 235 151
7 89 87 76 87 65 51 45 102 249 393 234 146
8 89 87 75 88 65 51 81 102 221 389 211 142
9 89 88 75 89 66 50 103 82 161 366 221 142
10 89 88 75 89 66 51 103 62 76 322 269 142
11 89 88 75 88 64 51 102 61 53 291 319 142
12 89 88 75 91 64 51 102 61 58 278 351 165
13 89 119 75 91 65 51 103 62 62 265 361 174
14 89 177 75 91 64 51 103 59 62 255 340 175
15 89 197 75 91 56 50 104 58 52 285 298 156
16 89 197 75 92 49 51 104 58 49 330 293 112
17 89 197 60 90 50 51 131 58 69 341 337 103
18 89 197 42 65 51 51 171 58 120 339 314 84
19 89 196 41 50 50 51 202 58 207 366 256 84
20 89 197 42 50 50 51 202 58 271 384 255 84
21 89 197 42 50 50 51 202 58 327 364 256 96
22 89 197 40 50 50 51 230 57 327 330 255 112
23 89 195 41 50 50 51 251 81 327 285 256 143
24 89 195 42 50 50 51 251 101 357 265 256 143
25 89 195 41 40 59 51 250 90 377 265 225 142
26 89 194 65 35 70 52 250 71 377 277 203 140
27 89 194 75 35 71 52 250 62 377 287 203 144
28 89 193 76 35 70 48 250 62 377 289 203 144
29 89 193 75 35 60 38 251 63 378 279 203 144
30 89 167 76 35 --- 39 251 63 380 253 197 144
31 90 --- 74 50 --- 39 --- 87 --- 265 193 ---

TOTAL 2757 4459 2244 2128 1744 1540 4331 2719 6340 10194 8004 4202
MEAN 88.9 149 72.4 68.6 60.1 49.7 144 87.7 211 329 258 140
AC-FT 5470 8840 4450 4220 3460 3050 8590 5390 12580 20220 15880 8330
MAX 90 197 149 92 71 52 251 227 380 420 361 181
MIN 88 87 40 35 49 38 39 57 49 253 193 84

CAL YR 2007 TOTAL 43414 MEAN 119 MAX 385 MIN 36 AC-FT 86110
WTR YR 2008 TOTAL 50662 MEAN 138 MAX 420 MIN 35 AC-FT 100500

MAX DISCH: 426 CFS AT 19:00 ON Jul. 3, 2008 GH 2.52 FT. SHIFT 0.04 FT.
MAX GH: 2.52 FT. AT 19:00 ON Jul. 3, 2008

FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD.