DWR_2668867

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

55
PLATTE RIVER BASIN

06729500 SOUTH BOULDER CREEK NEAR ELDORADO SPRINGS, CO

LOCATION.--Lat 39°55'51", long 105°17'44", in SW1/4 sec. 25, T.l S., R.71 W., Boulder County, Hydrologic Unit
10190005, on left bank 0.2 mi downstream from South Draw, 1.0 mi west of Eldorado Springs, 1.8 mi
downstream from South Boulder diversion canal, 5.0 mi south of Boulder, and 6.7 mi downstream from Gross
Reservoir.

DRAINAGE AREA AND PERIOD OF RECORD.--109 mi²; Apr. 1888-Oct. 1892, May 1895-Sept. 1901, Aug. 1904 to present.

GAGE.--Data Collection Platform (DCP), shaft encoder and a continuous chart recorder in metal box shelter and
corrugated metal pipe well. The primary reference gage is a metal drop tape from an adjustable
reference point with a supplemental outside chain gage. Urban Drainage and Flood Control District
operates a pressure transducer and LOS radio transmitter at the gage.

REMARKS.--The primary record is hourly averages of 15-minute data taken from satellite monitoring with chart
back up. The record is reliable and complete, except for February 29, March 1-8, 15 and 23, 2008, when
ice affected the stage discharge relationship; November 19, 2007 – February 26, 2008, when the station was
closed for winter; May 21-28, 2008, due to debris on the control; and, September 22, 2008, when gage heights
were unreliable due to equipment in the stream. The record is good, except for periods of no gage height
and ice affected record, which are poor; and periods of debris on the control and machinery in the channel,
which are fair. Station maintained by Steve Barrett and Patrick Tyler and record developed by Patrick
Tyler.

RATING TABLE.--BOCELSCO23 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 12 15 6.0 9.0 6.0 10 18 41 255 235 64 33
2 9.5 16 6.0 9.0 6.0 9.0 20 46 282 229 63 32
3 9.5 16 6.0 8.0 6.0 8.0 25 52 331 229 63 30
4 9.5 20 6.0 7.0 6.0 10 26 51 351 226 60 34
5 9.6 8.2 6.0 7.0 6.0 11 26 51 346 221 61 32
6 9.7 7.3 7.0 7.0 6.0 11 26 51 335 216 65 31
7 9.6 7.2 8.0 7.0 13 11 27 51 340 203 67 31
8 10 7.0 9.0 7.0 40 11 28 58 343 185 64 30
9 9.5 7.2 10 7.0 60 12 26 71 315 168 60 27
10 8.0 7.2 11 7.0 9.0 12 24 76 272 147 54 26
11 7.4 6.8 12 7.0 9.0 12 23 79 259 133 51 27
12 9.8 7.0 12 7.0 13 12 23 77 254 130 52 28
13 15 7.0 12 7.0 17 12 23 80 221 130 54 28
14 18 7.7 12 7.0 17 12 23 76 198 120 49 29
15 18 7.4 12 8.0 11 12 24 77 198 106 43 30
16 19 7.3 40 8.0 9.0 13 27 75 211 98 47 27
17 19 7.3 20 8.0 11 15 37 76 230 92 48 25
18 20 7.3 17 9.0 10 17 39 79 248 90 59 25
19 17 7.5 15 9.0 13 17 39 88 265 91 74 26
20 15 8.0 13 9.0 14 16 38 128 284 91 78 26
21 15 7.0 12 9.0 5.0 13 37 188 295 91 75 26
22 14 6.0 13 9.0 5.0 13 37 224 297 91 76 26
23 13 6.0 15 9.0 10 13 37 220 296 88 59 26
24 11 6.0 15 9.0 9.0 13 38 208 280 85 43 22
25 11 6.0 14 8.0 9.0 14 47 197 271 85 43 20
26 8.2 6.0 12 7.0 9.0 16 55 193 266 83 43 21
27 8.3 6.0 4.0 6.0 8.8 15 52 191 252 79 40 22
28 8.0 6.0 4.0 6.0 8.9 17 49 184 242 73 35 23
29 8.0 6.0 9.0 6.0 10 19 46 197 242 67 34 21
30 13 6.0 9.0 6.0 --- 19 43 234 242 72 33 18
31 16 --- 9.0 6.0 --- 19 --- 254 --- 72 33 ---

TOTAL 380.6 245.4 356.0 235.0 356.7 414.0 983 3673 8221 4026 1690 802
MEAN 12.3 8.18 11.5 7.58 12.3 13.4 32.8 118 274 130 54.5 26.7
AC-FT 755 487 706 466 708 821 1950 7290 16310 7990 3350 1590
MAX 20 20 40 9.0 60 19 55 254 351 235 78 34
MIN 7.4 6.0 4.0 6.0 5.0 8.0 18 41 198 67 33 18

CAL YR 2007 TOTAL 19770.8 MEAN 54.2 MAX 247 MIN 4 AC-FT 39220
WTR YR 2008 TOTAL 21382.7 MEAN 58.4 MAX 351 MIN 4 AC-FT 42410

MAX DISCH: 370 CFS AT 14:15 ON Jun. 3, 2008 GH 2.98 FT. SHIFT 0.02 FT.
MAX GH: 2.98 FT. AT 14:15 ON Jun. 3, 2008

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