DWR_2669027

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

26

PLATTE RIVER BASIN

06735500 BIG THOMPSON RIVER NEAR ESTES PARK, CO

LOCATION.--Lat 40°22'35", long 105°29'06", in NE¼NE¼ sec.29, T.S N., R.72 W., Larimer County, Hydrologic Unit 10190006, on
right bank 100 ft upstream from Dry Gulch, 600 ft downstream from Olympus Dam, and 2.0 mi east of Estes Park.

DRAINAGE AREA.--155 mi2. Area at site used Jan. 29, 1934, to Mar. 21, 1951, 162 mi2.

GAGE.--Water-stage recorder with satellite telemetry, and Parshall flume. Datum of gage is 7,422.5 ft above National
Geodetic Vertical Datum of 1929 (levels by U.S. Bureau of Reclamation). Prior to Jan. 29, 1934, nonrecording gage
on highway bridge 1.5 mi downstream at different datum. Jan. 29, 1934, to Mar. 21, 1951, water-stage recorder at
site 0.4 mi downstream at datum 10.5 ft, lower.

REMARKS.-- Record is complete and reliable except for Dec. 21-26, 1990, when well was frozen. Low flow regulated by Lake
Estes since Nov. 30, 1948. Diversion from Colorado River basin to Big Thompson River basin upstream from station
through Alva B. Adams tunnel began Aug. 10. 1947; since Apr, 15, 1953, this imported water has been diverted from
Lake Estes through Olympus tunnel bypassing this station. Since May 17, 1955. part of the natural flow of Big
Thompson River has also been diverted through Olympus tunnel and returned to the river downstream from the
station at mouth of canyon, near Drake. Station maintained and records developed by Jim Clark and Fred Renner.

RATING TABLE.--BTBLESCO09 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 52 23 13 14 9.8 9.3 11 32 146 127 128 76
2 52 30 12 14 9.8 9.4 10 49 550 127 128 78
3 53 32 13 14 9.8 8.4 10 27 257 126 128 77
4 45 22 12 14 9.8 9.3 10 38 122 127 129 78
5 44 20 12 14 9.8 9.2 10 44 123 126 128 77
6 48 32 12 14 9.8 9.1 10 34 122 127 128 77
7 46 41 12 14 9.7 8.9 11 14 135 127 129 77
8 59 27 12 14 9.9 9.1 11 53 202 126 130 76
9 59 30 12 14 9.8 8.6 27 35 123 125 129 78
10 52 23 12 12 9.9 8.6 26 62 136 125 129 78
11 53 22 12 9.5 10 8.7 28 91 122 125 129 78
12 53 23 17 9.5 10 8.7 24 100 123 126 125 78
13 48 22 17 9.4 10 8.3 26 100 126 126 129 77
14 44 24 17 9.3 9.8 8.5 18 100 121 126 129 77
15 48 23 16 9.3 9.2 9.3 27 100 123 126 129 67
16 46 23 16 9.2 9.2 9.4 27 125 136 126 105 54
17 52 20 18 9.1 9.1 9.7 33 126 122 127 105 52
18 42 23 17 8.9 9.1 9.7 35 127 123 126 104 52
19 29 22 19 9.2 9.1 9.4 39 127 124 127 103 51
20 52 23 18 10 9.3 10 30 127 124 126 102 44
21 53 23 18 10 9.2 10 34 127 125 126 101 51
22 36 9.1 17 10 9.3 10 28 127 128 125 100 51
23 42 7.1 17 10 9.3 9.8 36 125 127 127 101 52
24 45 21 17 11 9.4 9.8 16 127 127 126 99 51
25 39 20 16 10 9.5 9.8 30 127 127 125 99 53
26 28 20 16 10 9.6 9.9 46 129 127 125 101 42
27 48 9.3 18 10 9.8 10 23 130 128 126 98 52
28 38 11 19 9.8 10 10 49 128 127 125 97 45
29 33 12 19 9.8 --- 11 22 128 123 125 98 41
30 35 12 19 9.8 --- 11 19 126 127 125 86 44
31 30 --- 19 9.8 --- 11 --- 126 --- 126 79 ---

TOTAL 1404 649.5 484 341.6 269.0 293.9 726 2911 4426 3905 3505 1884
MEAN 45.3 21.6 15.6 11.0 9.61 9.48 24.2 93.9 148 126 113 62.8
AC-FT 2780 1290 960 678 534 583 1440 5770 8780 7750 6950 3740
MAX 59 41 19 14 10 11 49 130 550 127 130 78
MIN 28 7.1 12 8.9 9.1 8.3 10 14 121 125 79 41

CAL YR 1990 TOTAL 23640.5 MEAN 64.8 MAX 376 MIN 7.1 AC-FT 46890
WTR YR 1991 TOTAL 20799.0 MEAN 57.0 MAX 550 MIN 7.1 AC-FT 41250

MAX DISCH 634 CFS AT 0030 02-JUN-1991 GH 4.45 FT. SHIFT 0.02 FT. MAX GH 4.45 FT. AT 0030
02-JUN-1991