DWR_2668988

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

PLATTE RIVER BASIN

06731000 ST. VRAIN CREEK AT MOUTH, NEAR PLATTEVILLE, CO

LOCATION.--Lat 40°15'29", long 104°52'45", in SE¼NW¼ sec. 3, T,3 N., R.67 W., Weld County, Hydrologic Unit
10190005, on right bank 140 ft downstream from bridge on county road, 1.3 mi upstream from mouth,
and 4.2 mi northwest of Platteville.

DRAINAGE AREA AND PERIOD OF RECORD.--976 mi²; 1927 to present.

GAGE.--Graphic water-stage recorder and satellite monitoring DCP in a 54 inch metal pipe shelter and well.
A Sutron Accububbler was installed May 8, 2002 as a back up. Data collection platform is the
primary record with graphic chart as backup. The primary reference for the Accububbler is the
outside staff, which was installed in April at a datum 1.0 ft. lower so that lower stages could be
recorded.

REMARKS.--The primary record is hourly satellite data from the following sources and dates: October 1 –
November 14, 2002: Stilling Well; November 15, 18, 22: Accubar; November 16-17, 19-21, 23-30:
Stilling Well; December 1 – March 13, 2003: Accubar (Well Beached most of time)March 14-24, 28-31:
Stilling Well; March 1-13, 25-27:Accubar; April 1-20: Stilling Well; April 21–May 14, 18-21:Accubar;
May 15-17, 22-31: Stilling Well; June 1-7, 12-30: Stilling Well; June 8-11: Accubar; July 1-3, 18-
25: Stilling Well; July 4-17, 26-31: Accubar; August 1-18: Accubar;August 19-31: Stilling Well;
September 1-11: Accubar; September 12-30: Stilling Well. Daily maximum and minimum stages for the
satellite record checked to within ± 0.02 with the chart. The record is good and reliable except
for March 14-17, 2003 when the DCP was down and the stilling well was beached. This period was
estimated and considered fair. Station maintained and record developed by M. Lee Cunning.

RATING TABLE.--SVCPLACO27 USED FROM 01-OCT-2002 TO 10-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 65 89 69 61 65 62 126 161 1880 298 187 298
2 89 84 69 61 60 63 156 158 1640 286 183 227
3 108 81 69 63 61 64 160 137 1210 220 163 206
4 99 75 69 62 60 60 166 132 911 174 131 205
5 80 72 70 59 60 61 149 112 757 131 105 190
6 83 73 67 58 64 59 154 106 622 121 98 164
7 81 74 67 63 60 57 151 101 595 133 106 159
8 83 75 67 65 66 54 147 99 457 138 149 159
9 80 74 64 60 70 52 135 109 333 121 137 167
10 80 67 69 56 64 52 125 418 292 114 125 166
11 80 65 66 55 66 61 122 726 430 114 117 159
12 74 63 69 64 62 75 164 408 573 119 105 131
13 71 66 65 62 62 59 196 285 610 117 100 122
14 70 66 66 64 57 59 213 222 605 117 90 114
15 71 63 65 64 56 59 241 236 628 117 82 108
16 73 64 65 60 59 56 243 516 691 120 77 109
17 86 65 70 58 53 61 195 481 615 121 80 105
18 77 64 63 59 56 136 195 450 737 113 70 122
19 71 65 66 58 56 199 214 436 783 123 205 127
20 69 71 61 57 54 207 248 468 745 168 159 115
21 68 67 67 58 56 228 194 438 679 178 114 106
22 77 72 65 55 52 238 157 345 605 177 109 104
23 78 68 66 52 51 200 175 302 618 154 100 104
24 79 67 64 59 54 206 357 313 629 148 105 102
25 82 73 56 57 54 203 318 384 647 137 99 98
26 81 75 54 58 65 179 222 350 627 145 100 96
27 73 68 68 57 65 171 206 472 461 161 108 94
28 76 74 71 60 72 183 206 682 339 172 106 94
29 87 72 66 58 --- 141 188 1240 291 172 128 98
30 103 69 62 62 --- 122 180 1390 293 181 378 103
31 98 --- 61 67 --- 116 --- 1870 --- 175 526 ---

TOTAL 2492 2121 2036 1852 1680 3543 5703 13547 20303 4765 4342 4152
MEAN 80 71 66 60 60 114 190 437 677 154 140 138
AC-FT 4940 4210 4040 3670 3330 7030 11310 26870 40270 9450 8610 8240
MAX 108 89 71 67 72 238 357 1870 1880 298 526 298
MIN 65 63 54 52 51 52 122 99 291 113 70 94

WTR YR 2003 TOTAL 66536 MEAN 182 MAX 1880 MIN 51 AC-FT 132000

MAX DISCH: 2070 CFS AT 19:00 ON May. 31, 2003 GH 6.82 FT. SHIFT -0.23 FT.
MAX GH: 6.82 FT. AT 19:00 ON May. 31, 2003

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

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