DWR_2668867

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 2008
• Document Type - Publications and Reports: Streamflow Report

11
PLATTE RIVER BASIN

TARRYALL CREEK BELOW TARRYALL RESERVOIR, CO

LOCATION.--Lat. 39° 13’ 18”, Long. 105° 36’ 07”; in SW1/4 of sec 31, T. 9S, R. 73W, Park County, about 500 ft.
downstream from Tarryall Reservoir.

DRAINAGE AREA AND PERIOD OF RECORD.--355 sq. mi., from DWR Dam Safety Section database. Age of the gage is not
known, although the reservoir was built in 1929. DWR first ran levels in June of 1975, and installation
in 1970’s is consistent with the type of materials used. The gage has been operated infrequently and
records have never been kept prior to 2005. The gage was activated with satellite monitoring in WY2005.

GAGE.--Data Collection Platform (DCP) and shaft encoder in a 36-in. CMP shelter and cast iron well, located on the
right downstream abutment of a bridge on Park County Road 77. The primary reference gage is a drop tape
with a supplemental staff gage on the center abutment of the bridge. Gage is operated and equipment is
maintained by the Colorado Div. of Water Resources under a cooperative agreement with the CO Div. of
Wildlife, the owner of Tarryall Reservoir. Elevation of gage is 8800 ft. from topographic map.
REMARKS.--Primary record is hourly averages of 15-minute satellite data. Record is complete and reliable,
except for November 23, 2007 to April 1, 2008, when the station was closed for the winter; November 23,
2007 and April 1, 2008 were partial record days; and April 1-4, 2008, when there were problems with the
DCP. Encoder calibration was checked with 34 visits by DWR personnel while the gage was open. The
record is good, except for periods of partial day record and DCP problems, which are poor. The station
is operated on a seasonal basis. Station operated and record developed by Mike Wild.

RATING TABLE.--TARTARCO02 USED FROM 01-Oct-2007 to 30-Sep-2008

DISCHARGE, IN CFS, WATER YEAR OCTOBER 2007 TO SEPTEMBER 2008
MEAN VALUES

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

1 37 20 --- --- --- --- 45 61 133 158 66 38
2 37 20 --- --- --- --- 45 60 148 158 60 36
3 38 19 --- --- --- --- 45 43 161 153 58 34
4 37 17 --- --- --- --- 46 43 181 147 58 32
5 32 17 --- --- --- --- 48 45 203 137 58 29
6 29 17 --- --- --- --- 50 52 203 134 59 27
7 26 16 --- --- --- --- 50 60 180 149 59 25
8 25 16 --- --- --- --- 42 64 161 158 62 23
9 23 17 --- --- --- --- 40 70 159 146 63 22
10 22 16 --- --- --- --- 40 69 158 130 64 22
11 22 18 --- --- --- --- 37 63 158 115 68 22
12 21 19 --- --- --- --- 33 58 157 105 64 27
13 20 18 --- --- --- --- 31 67 152 99 55 40
14 21 18 --- --- --- --- 34 80 139 92 46 39
15 24 17 --- --- --- --- 43 91 130 92 44 33
16 26 14 --- --- --- --- 69 108 130 92 78 29
17 27 16 --- --- --- --- 73 115 131 91 148 26
18 27 17 --- --- --- --- 66 105 139 96 152 25
19 23 17 --- --- --- --- 67 94 148 103 106 26
20 22 16 --- --- --- --- 71 95 154 98 85 28
21 23 15 --- --- --- --- 78 105 158 91 71 29
22 22 15 --- --- --- --- 80 119 158 86 60 29
23 19 15 --- --- --- --- 84 133 160 84 58 27
24 21 --- --- --- --- --- 92 122 163 86 54 25
25 23 --- --- --- --- --- 91 106 162 84 50 23
26 23 --- --- --- --- --- 77 100 157 82 48 23
27 22 --- --- --- --- --- 59 108 151 81 47 22
28 22 --- --- --- --- --- 45 110 147 78 44 22
29 21 --- --- --- --- --- 46 114 154 79 40 22
30 21 --- --- --- --- --- 54 126 157 79 38 22
31 21 --- --- --- --- --- --- 133 --- 73 38 ---

TOTAL 777 390 --- --- --- --- 1681 2719 4692 3356 2001 827
MEAN 25.1 17.0 --- --- --- --- 56.0 87.7 156 108 64.5 27.6
AC-FT 1540 774 --- --- --- --- 3330 5390 9310 6660 3970 1640
MAX 38 20 --- --- --- --- 92 133 203 158 152 40
MIN 19 14 --- --- --- --- 31 43 130 73 38 22

CAL YR 2007 TOTAL 21560 MEAN 59.1 MAX 303 MIN 14 AC-FT 42760(PARTIAL YEAR RECORD)
WTR YR 2008 TOTAL 16443 MEAN 69.4 MAX 203 MIN 14 AC-FT 32610(PARTIAL YEAR RECORD)

MAX DISCH: 212 CFS AT 16:45 ON Jun. 5, 2008 GH 3.67 FT. SHIFT -0.12 FT.
MAX GH: 3.67 FT. AT 16:45 ON Jun. 5, 2008

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