DWR_2669027

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 1991
• Document Type - Publications and Reports: Streamflow Report

22

PLATTE RIVER BASIN

06729500 SOUTH BOULDER CREEK NEAR ELDORADO SPRINGS, CO

LOCATION.--Lat 39°55'52", long 105°17'43", in SE¼ sec.26, T.l S., R.71 W., Boulder County, Hydrologic Unit 10190005, on
left bank 0.2 mi downstream from South Draw, 1.0 mi west of Eldorado Springs, 1.8 mi downstream from South
Boulder diversion canal, 5.0 mi south of Boulder, and 6.7 mi downstream from Gross Reservoir.

DRAINAGE AREA.--109 mi2.

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 6,080 ft, from topographic map. See WSP 1710
or 1730 for history of changes prior to May 10, 1940.

REMARKS.--Record is complete and reliable except for the following periods: No record Dec. 5-6, 1990, when float frozen
in ice; Dec.7-31, 1990, Jan.1-31, Feb.1-12, 1991, when station was closed. Record was ice affected Nov.7, 27-29,
Dec. 1-4, 1990, and Feb. 19, 24-26 1991. Water is imported upstream from Gross Reservoir from Colorado River
basin through Moffat Tunnel. Flow regulated since May 1, 1955, by Gross Reservoir, capacity, 43,060 acre-ft, 6.7
mi upstream from station. City of Denver diverts water 1.8 mi upstream from station. Station maintained and
records developed by Fred Renner.

RATING TABLE.--BOCELSCO21 USED FROM 01-OCT-1990 TO 30-SEP-1991

DISCHARGE, IN CFS, WATER YEAR OCTOBER 1990 TO SEPTEMBER 1991
MEAN VALUES

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

1 14 20 4.7 3.0 11 9.1 11 35 335 166 70 25
2 14 17 5.0 3.0 8.0 9.1 23 37 355 145 64 24
3 14 16 5.0 3.0 9.0 8.3 36 35 308 139 59 21
4 15 16 4.5 3.0 11 8.1 36 35 284 132 58 20
5 17 16 3.8 3.0 11 12 42 34 300 116 56 23
6 17 17 3.0 3.0 11 15 49 35 307 106 57 20
7 18 18 2.5 2.8 10 16 48 35 308 98 56 20
8 21 22 2.5 2.8 14 15 48 35 311 95 56 19
9 20 22 2.5 2.8 16 15 35 35 312 96 68 19
10 20 22 2.5 2.5 16 15 25 35 313 95 67 17
11 20 22 2.5 2.5 16 15 22 35 311 93 54 20
12 18 22 2.5 2.5 16 15 24 36 271 95 53 22
13 16 22 2.5 2.5 16 16 23 57 235 97 53 21
14 16 22 2.5 2.5 15 16 22 99 236 97 53 20
15 17 22 2.2 2.5 12 15 22 121 236 82 45 20
16 17 22 2.0 2.5 9.6 14 22 140 236 70 38 20
17 17 22 2.0 2.5 9.4 13 20 160 234 70 38 20
18 16 22 2.0 2.5 9.3 13 19 168 234 63 37 20
19 22 19 2.5 4.0 10 13 22 172 235 61 37 21
20 28 12 2.5 5.0 10 13 24 203 233 61 37 22
21 27 5.2 2.2 5.5 9.6 17 24 255 235 60 36 22
22 27 6.6 2.0 12 9.4 19 24 288 239 85 36 22
23 29 5.1 2.0 18 8.9 19 26 301 239 80 30 24
24 28 4.8 2.0 14 8.8 19 31 310 238 78 24 23
25 27 4.7 2.0 5.5 8.2 16 32 309 235 125 24 23
26 26 4.8 2.5 5.0 8.2 13 32 310 215 163 24 21
27 26 4.8 3.0 5.0 9.6 13 32 306 197 169 24 19
28 26 4.8 3.0 5.0 9.0 13 32 316 194 167 24 18
29 17 4.7 3.0 6.0 --- 13 32 318 191 114 24 18
30 14 4.7 3.6 14 --- 12 33 321 189 68 25 20
31 21 --- 3.2 21 --- 12 --- 323 --- 69 25 ---

TOTAL 625 443.2 87.7 168.9 312.0 431.6 871 4899 7766 3155 1352 624
MEAN 20.2 14.8 2.83 5.45 11.1 13.9 29.0 158 259 102 43.6 20.8
AC-FT 1240 879 174 335 619 856 1730 9720 15400 6260 2680 1240
MAX 29 22 5.0 21 16 19 49 323 355 169 70 25
MIN 14 4.7 2.0 2.5 8.0 8.1 11 34 189 60 24 17

CAL YR 1990 TOTAL 20968.9 MEAN 57.4 MAX 345 MIN 2.0 AC-FT 41590
WTR YR 1991 TOTAL 20735.4 MEAN 56.8 MAX 355 MIN 2.0 AC-FT 41130

MAX DISCH 368 CFS AT 2030 01-JUN-1991 GH 3.06 FT. SHIFT -0.06 FT. MAX GH 3.06 FT. AT 2030
01-JUN-1991