DWR_2668978

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 2002
• Document Type - Publications and Reports: Streamflow Report

42

PLATTE RIVER BASIN

ST. VRAIN SUPPLY CANAL NEAR LYONS, CO

LOCATION.--Lat 40°13'05", long 105°15'35", NE¼NW¼ sec. 20, T.3 N., R.70 W., Boulder County.

DRAINAGE AREA.--N/A

GAGE.--Graphic A-35 water-stage recorder in a 36-inch galvanized shelter at 15' Parshall Flume. Data
Collection Platform and shaft encoder was installed in 1997.

REMARKS.--The primary record is hourly DCP data with chart backup. The record is complete and reliable. Mean
daily values from the chart were used on the following days. April 4-9,2002—Shaft encoder was set
wrong when station was opened. September 30, 2002—DCP was not working correctly. The canal was in use
from October 1, 2001 to November 6, 2001 and April 4, 2002 to September 30 2002. The record is good.
This record will soon be kept as part of Water District 5 Diversion Data. At that time it will no
longer be published as part of Colorado Streamflow Data. Station maintained and record developed by
Merlin Friedrichsen.

RATING TABLE.--SVSLYOCO05 USED FROM 01-OCT-2001 TO 30-SEP-2002

DISCHARGE, IN CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
MEAN VALUES

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

1 70 60 0 0 0 0 0 137 195 105 205 106
2 80 53 0 0 0 0 0 136 188 119 213 100
3 91 47 0 0 0 0 0 135 168 139 209 110
4 104 47 0 0 0 0 7 136 158 134 216 124
5 116 47 0 0 0 0 5.7 136 150 133 222 124
6 122 27 0 0 0 0 5.1 136 159 134 206 117
7 125 0 0 0 0 0 7.2 129 170 146 178 115
8 124 0 0 0 0 0 7.1 125 179 154 167 119
9 117 0 0 0 0 0 18 126 184 179 168 121
10 112 0 0 0 0 0 33 138 185 194 155 121
11 115 0 0 0 0 0 32 149 166 205 140 106
12 95 0 0 0 0 0 32 151 150 193 150 94
13 62 0 0 0 0 0 33 151 137 180 165 85
14 63 0 0 0 0 0 34 152 98 179 170 70
15 69 0 0 0 0 0 33 151 70 183 173 64
16 71 0 0 0 0 0 34 152 61 183 192 65
17 66 0 0 0 0 0 39 129 46 232 206 59
18 66 0 0 0 0 0 45 102 38 275 206 51
19 65 0 0 0 0 0 45 89 39 300 214 50
20 65 0 0 0 0 0 51 83 39 318 222 51
21 64 0 0 0 0 0 45 84 50 317 207 51
22 64 0 0 0 0 0 43 89 63 337 181 52
23 84 0 0 0 0 0 43 93 73 342 170 52
24 107 0 0 0 0 0 42 98 73 296 171 50
25 107 0 0 0 0 0 72 96 71 264 155 50
26 107 0 0 0 0 0 102 96 76 266 143 51
27 100 0 0 0 0 0 106 97 81 250 143 48
28 93 0 0 0 0 0 104 96 82 232 143 43
29 98 0 0 0 --- 0 103 95 97 226 120 44
30 88 0 0 0 --- 0 120 99 110 208 101 43
31 70 --- 0 0 --- 0 --- 134 --- 193 103 ---

TOTAL 2780 281 0 0 0 0 1241.1 3720 3356 6616 5414 2336
MEAN 90 9.37 0 0 0 0 41.4 120 112 213 175 78
AC-FT 5510 557 0 0 0 0 2460 7380 6660 13120 10740 4630
MAX 125 60 0 0 0 0 120 152 195 342 222 124
MIN 62 0 0 0 0 0 0 83 38 105 101 43

WTR YR 2002 TOTAL 25744.1 MEAN 70.5 MAX 342 MIN 0 AC-FT 51060

MAX DISCH: 354 CFS AT 12:20 ON Jul. 22, 2002 GH 2.98 FT. SHIFT 0 FT.
MAX GH: 2.98 FT. AT 12:20 ON Jul. 22, 2002

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

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