DWR_2669027

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

19

PLATTE RIVER BASIN

06727000 BOULDER CREEK NEAR ORODELL, CO

LOCATION.--Lat 40°00'23", long 105°19'49", in NE¼SW¼ sec.34, T.l N., R.71 W., Boulder County, Hydrologic Unit 10190005, on
left bank along State Highway 119, 0.7 mi southwest of old Orodell, 1.1 mi upstream from Fourmile Creek, and 2.9
mi southwest of courthouse in Boulder.

DRAINAGE AREA.--102 mi2.

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 5,826 ft above National Geodetic Vertical
Datum of 1929, from topographic map. Prior to Sept. 1,1907, nonrecording gage, and Sept. 1. 1907, to May 11,
1917, water-stage recorder, at sites 1.1 mi downstream, just upstream from Fourmile Creek, at different datums.

REMARKS.-- Flow regulated by Barker Reservoir, capacity, 11,500 acre-Ft. Low flow during non-irrigation season regulated
by Orodell power-plant 1,500 ft upstream from station. Record is complete and reliable except for Jan. 24-30,
1991, when the recorder cable came out of pulley wheel causing float to be above water surface in stilling well.
Discharge for periods of no gage-height record were estimated using partial chart record, and measurement No.
127. Discharge for ice affected days were computed using corrected gage-heights. The period Nov.-Mar. cover a
time where ice forms during period of low flow, but is washed away by the high releases from power-plant. The
blocking off of ice (low portion of day) and measurements Nos. 122, 124-130 were used to compute corrected gage-
heights. Station maintained and records developed by Fred Renner.

RATING TABLE.--BOCOROCO13 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 29 10 22 12 15 15 13 18 263 207 74 49
2 28 25 19 13 15 14 21 17 253 187 77 45
3 30 35 15 18 17 12 28 22 206 180 114 40
4 33 27 15 19 14 19 30 26 185 166 148 45
5 28 31 22 23 14 20 30 27 189 148 130 44
6 26 26 21 18 13 20 40 27 199 134 129 32
7 22 27 21 18 12 20 31 29 206 124 164 19
8 20 29 18 23 11 20 17 25 166 137 160 38
9 25 25 18 22 13 21 21 28 146 170 145 47
10 29 26 19 22 18 15 16 49 137 166 159 61
11 28 20 18 19 15 20 14 69 134 173 150 70
12 27 24 20 22 14 21 12 72 143 163 129 81
13 25 25 28 22 15 20 11 61 148 148 99 91
14 25 32 19 24 14 23 16 54 138 125 94 86
15 34 38 14 25 15 25 16 104 140 110 80 76
16 33 28 16 24 12 23 25 194 383 98 79 64
17 22 28 17 20 12 24 32 128 402 97 75 65
18 18 28 18 26 13 23 25 101 409 116 72 69
19 20 28 16 25 15 23 19 137 372 102 79 61
20 25 29 22 24 13 21 17 170 338 117 70 61
21 26 28 11 21 14 18 19 137 349 114 73 59
22 24 36 19 28 17 19 21 186 350 142 69 47
23 13 32 13 27 13 19 27 219 352 178 64 49
24 12 31 11 10 18 20 27 188 319 185 59 33
25 12 30 8.4 10 17 20 29 180 274 185 52 29
26 11 28 9.0 10 16 16 29 195 243 185 51 35
27 12 21 12 10 12 15 25 242 207 164 56 33
28 12 23 9.7 14 15 13 24 255 216 147 51 16
29 11 21 12 9.3 --- 15 23 247 224 125 48 17
30 10 20 11 10 --- 14 20 259 230 98 52 19
31 11 --- 11 16 --- 13 --- 254 --- 92 46 ---

TOTAL 681 811 505.1 584.3 402 581 678 3720 7321 4483 2848 1481
MEAN 22.0 27.0 16.3 18.8 14.4 18.7 22.6 120 244 145 91.9 49.4
AC-FT 1350 1610 1000 1160 797 1150 1340 7380 14520 8890 5650 2940
MAX 34 38 28 28 18 25 40 259 409 207 164 91
MIN 10 10 8.4 9.3 11 12 11 17 134 92 46 16

CAL YR 1990 TOTAL 25158.5 MEAN 68.9 MAX 454 MIN 3.7 AC-FT 49900
WTR YR 1991 TOTAL 24095.4 MEAN 66.0 MAX 409 MIN 8.4 AC-FT 47790

MAX DISCH 428 CFS AT 0530 18-JUN-1991 GH 3.27 FT. SHIFT 0.01 FT. MAX GH 3.27 FT. AT 0530
18-JUN-1991