DWR_2668988

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 2003
• Document Type - Publications and Reports: Streamflow Report

PLATTE RIVER BASIN

06738000 BIG THOMPSON RIVER AT MOUTH OF CANYON, NEAR DRAKE, CO

LOCATION.--Lat 40°25'18", long 105°13'34", in SW¼SW¼ sec. 3, T,5 N., R.70 W., Larimer County, Hydrologic
Unit 10190006, on right bank at mouth of canyon, 400 ft upstream from Handy Ditch diversion dam, and
6.0 mi east of Drake.

DRAINAGE AREA AND PERIOD OF RECORD.--305 mi²; 1927-1933, 1938 to present.

GAGE.--Water-stage recorder with satellite telemetry and shaft encoder activated by manometer in a concrete
shelter with outside wire weight for reference. A bank-operated cableway was added in 1997 for
intermediate flow measurements. This year an accububbler was used briefly as a temporary replacement
for the manometer.

REMARKS.--The primary record is hourly data, taken from satellite monitoring with chart back-up. Sharp
changes in the record occur due to diversions through Dille Tunnel (about 1 mile upstream), releases
from Lake Estes, and draining/filling of the pond for the City of Loveland power plant. The record
is good due to frequency of measurements & visits and the presence of an artificial control, except
for the following periods which were estimated: November 6, 2002 to March 21, 2003, when station was
closed for winter; May 27, 28, 30, when manometer malfunctioned. Record developed and station
maintained by Merlin Friedrichsen.

RATING TABLE.--BTCANYCO15 USED FROM 01-OCT-2002 TO 03-OCT-2003

DISCHARGE, IN CFS, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
MEAN VALUES

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

1 48 28 31 28 27 27 53 54 984 95 68 66
2 59 35 31 28 27 26 63 52 947 96 66 41
3 68 35 31 28 27 26 71 48 788 79 66 39
4 60 33 31 27 28 26 68 87 696 73 70 42
5 49 33 31 27 28 27 61 117 564 70 69 40
6 47 32 31 29 28 27 58 125 361 69 68 40
7 44 31 30 28 25 27 54 117 245 67 67 42
8 41 31 32 29 25 27 51 108 187 67 68 45
9 41 30 31 27 25 26 51 109 138 70 70 42
10 39 30 31 28 25 28 53 134 131 62 69 41
11 37 31 31 27 24 28 55 140 245 62 64 41
12 35 30 31 27 24 28 56 152 338 62 64 40
13 33 32 30 27 25 27 60 168 311 63 62 40
14 32 30 29 27 26 29 67 95 235 61 62 40
15 31 31 29 28 26 31 85 77 198 58 53 40
16 26 32 29 29 26 31 91 94 196 57 53 43
17 29 30 29 27 26 32 88 63 216 55 88 43
18 28 30 28 27 27 35 86 46 234 62 106 43
19 24 29 29 27 28 34 82 76 248 63 79 42
20 24 29 28 27 27 35 81 69 224 66 68 42
21 24 29 27 27 27 37 77 59 215 109 70 42
22 32 30 27 27 27 39 77 56 201 120 65 46
23 28 30 27 28 27 51 85 59 202 118 67 47
24 23 28 27 28 26 71 89 97 206 115 70 46
25 26 30 37 27 24 62 92 171 206 82 72 58
26 29 29 37 27 24 62 100 201 191 75 70 98
27 30 31 26 27 25 74 113 356 135 101 70 78
28 31 30 26 27 25 60 112 514 103 80 67 58
29 28 31 26 27 --- 51 79 567 93 128 76 58
30 29 31 27 27 --- 49 55 744 88 110 94 59
31 26 --- 27 27 --- 48 --- 994 --- 72 85 ---

TOTAL 1101 921 917 851 729 1181 2213 5749 9126 2467 2186 1442
MEAN 36 31 30 28 26 38 74 185 304 80 71 48
AC-FT 2180 1830 1820 1690 1450 2340 4390 11400 18100 4890 4340 2860
MAX 68 35 37 29 28 74 113 994 984 128 106 98
MIN 23 28 26 27 24 26 51 46 88 55 53 39

WTR YR 2003 TOTAL 28883 MEAN 79.1 MAX 994 MIN 23 AC-FT 57290

MAX DISCH: 1190 CFS AT 09:00 ON May. 31, 2003 GH 4.45 FT. SHIFT -0.04 FT.
MAX GH: 4.45 FT. AT 09:00 ON May. 31, 2003

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

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