DWR_2668864

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 2007
• Document Type - Publications and Reports: Streamflow Report

7
PLATTE RIVER BASIN

06696000 SOUTH PLATTE RIVER BELOW ELEVENMILE RESERVOIR NEAR LAKE GEORGE, CO

LOCATION.--Lat 38°54'19", long 105°28'22". in SW¼ sec. 20, T.13 S., R.72 W., Park County, Hydrologic Unit
10190001, on left bank 700 ft downstream from Elevenmile Canyon Reservoir and 8.2 mi southwest of town of
Lake George.

DRAINAGE AREA AND PERIOD OF RECORD.--963 mi². October 1929 to current year. Monthly data only for some
periods.

GAGE.--Water-stage recorder and satellite monitoring (Sutron Satlink 2 DCP and shaft encoder)in a concrete shelter
at a 15-ft. Parshall Flume with outside staff gage. Primary reference is an inside tape gage with
supplemental outside staff gage in the flume. Elevation of gage is 8,458 ft from topographic map.
Station is owned and maintained by the Denver Water Dept. A 10-foot rectangular bypass channel is
located beside the upper right wingwall of the 15-foot Parshall. The channel is normally kept closed by
boards. At a gage height of 3.26 in the Parshall, water reaches the floor of the bypass channel.

REMARKS.--Record is taken from hourly satellite data and is complete and reliable for the water year, except the
period Nov. 2-17, 2006, when the flume was out of operation for maintenance. The record is good, except
during the period of flume maintenance. This period of record was estimated using Denver Water Board
operational records and with values obtained by interpolation of chart gage heights before and after the
flume was taken out of service. The record for this period is estimated and considered poor. Station
operated and record developed by Mike Wild.

RATING TABLE.--STD15FTPF USED FROM 01-OCT-2006 TO 30-SEP-2007

DISCHARGE, IN CFS, WATER YEAR OCTOBER 2006 TO SEPTEMBER 2007
MEAN VALUES

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

1 76 191 102 148 84 62 52 38 49 253 248 197
2 75 93 106 147 85 61 50 38 55 244 243 195
3 77 43 111 146 81 61 46 39 63 238 243 193
4 78 44 115 145 78 61 44 36 73 236 250 190
5 79 45 119 148 78 61 42 37 85 233 256 153
6 79 46 122 151 78 60 38 38 106 221 290 128
7 79 47 125 149 75 61 37 44 126 213 341 126
8 78 48 127 149 72 61 37 44 143 213 365 126
9 80 49 128 139 69 61 37 42 163 215 363 126
10 85 50 130 132 67 62 46 41 175 213 355 124
11 83 51 134 125 67 63 43 40 183 215 338 123
12 77 52 135 118 65 64 40 39 196 211 320 122
13 75 53 136 117 64 64 41 39 205 203 296 119
14 74 54 134 116 63 64 41 39 214 197 277 116
15 76 55 136 114 63 62 39 36 226 192 275 106
16 77 57 136 110 63 63 39 38 242 187 273 71
17 77 58 133 108 61 64 43 40 258 181 263 53
18 82 65 135 106 62 64 43 39 274 169 261 55
19 82 65 136 104 62 64 43 38 289 157 262 55
20 82 72 141 105 61 65 39 38 299 192 262 57
21 79 76 145 105 62 65 37 40 302 204 272 81
22 79 77 145 105 61 66 37 39 298 199 279 54
23 78 78 144 103 61 68 36 36 291 191 274 55
24 78 78 143 102 60 74 41 39 288 184 265 56
25 79 79 143 99 59 77 42 42 288 179 246 56
26 95 80 141 95 59 74 41 44 289 181 237 57
27 98 81 142 92 58 70 41 47 289 193 226 56
28 96 86 144 90 59 66 40 49 283 225 219 56
29 94 90 150 87 --- 61 39 52 274 249 211 58
30 121 97 151 86 --- 59 39 54 265 254 207 58
31 182 --- 149 84 --- 56 --- 52 --- 253 201 ---

TOTAL 2650 2060 4138 3625 1877 1984 1233 1277 6291 6495 8418 3022
MEAN 85.5 68.7 133 117 67.0 64.0 41.1 41.2 210 210 272 101
AC-FT 5260 4090 8210 7190 3720 3940 2450 2530 12480 12880 16700 5990
MAX 182 191 151 151 85 77 52 54 302 254 365 197
MIN 74 43 102 84 58 56 36 36 49 157 201 53

CAL YR 2006 TOTAL 37333 MEAN 102 MAX 219 MIN 33 AC-FT 74050
WTR YR 2007 TOTAL 43070 MEAN 118 MAX 365 MIN 36 AC-FT 85430

MAX DISCH: 776 CFS AT 12:10 ON Sep. 21, 2007 GH 5.07 FT. SHIFT 0.00 FT.
MAX GH: 5.07 FT. AT 12:10 ON SEP. 21, 2007

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