DWR_2668867

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

45
PLATTE RIVER BASIN

06725500 MIDDLE BOULDER CREEK AT NEDERLAND, CO

LOCATION.--Lat 39°57'42", long 105°30'16", in NE¼SE¼ sec. 13, T.l S., R.73 W., Boulder County, Hydrologic Unit
10190005, on left bank at Nederland just downstream from North Beaver Creek at inlet to Barker
Reservoir.

DRAINAGE AREA AND PERIOD OF RECORD.--36.2 mi²; June 1907 to present.

GAGE.--Data Collection Platform (DCP), shaft encoder and a continuous chart recorder in a timber shelter and
concrete well at a sharp-crested Cipolletti weir with rectangular overflow crests. The primary reference
gage is a metal drop tape from an adjustable reference point with a supplemental outside staff gage. City
of Boulder maintains the gage and chart recorder.

REMARKS.--Primary record is hourly averages of 15-minute data taken from satellite monitoring with chart back
up. Record is complete and reliable, except for December 3, 9-10, 13-14, 23-24, 29-31, 2007, January 1-
2, 10-25, 29-31, February 1-2, 6-10, 13-14, 17-19, March 3, 23-25, 2008, when the stage-discharge
relation was affected by ice on the weir and inlets freezing. The record is good, except during periods
of ice affected record, which are estimated and poor. Flows above 250 cfs (GH = 2.34 ft.) on June 1-5,
18-30, 2008 are considered fair due to lack of definition of the stage-shift relationships at this gage
height. Occasionally tree limbs catch on the weir affecting gage heights. Any debris or ice on the
control is typically cleared weekly by the City of Boulder operator. Applied datum corrections for
debris were only applied for short periods. Station maintained by City of Boulder and record developed
by Lee Cunning.

RATING TABLE.--BOCMIDCO07 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 14 19 7.2 7.0 6.0 5.5 5.4 38 286 246 64 31
2 19 18 7.0 7.0 7.0 5.2 5.7 30 323 232 63 29
3 17 15 7.0 6.6 7.4 5.0 6.4 32 324 234 62 28
4 17 17 7.0 5.8 5.9 5.7 5.8 28 291 236 59 27
5 17 16 7.0 5.3 5.3 5.4 6.2 30 269 219 58 27
6 18 15 7.3 5.2 5.0 5.4 6.2 37 213 229 61 25
7 17 14 8.1 5.2 5.0 5.4 6.1 49 211 218 74 23
8 15 13 8.0 5.2 5.0 5.0 5.9 56 229 188 61 23
9 17 13 7.5 5.6 6.0 4.8 6.2 48 180 165 65 21
10 16 13 7.5 6.0 6.0 4.7 6.0 48 186 162 61 20
11 15 12 8.4 6.0 6.7 4.8 5.8 42 205 159 73 23
12 15 13 7.0 6.0 5.7 5.1 5.6 51 151 151 57 34
13 15 12 7.0 6.0 6.0 4.8 6.2 62 129 144 49 31
14 20 11 7.0 6.0 6.0 4.8 8.3 50 154 128 45 29
15 21 8.0 8.1 6.0 5.1 4.8 12 49 201 120 49 26
16 19 13 8.4 6.0 5.0 4.9 12 45 229 122 73 23
17 19 9.7 7.6 6.0 5.0 4.9 11 52 249 120 76 23
18 14 8.8 7.1 6.0 5.0 5.0 9.7 81 267 121 61 29
19 21 8.3 6.9 6.0 5.0 4.9 11 137 283 109 51 33
20 22 8.2 6.6 6.0 5.1 5.3 17 184 304 105 45 32
21 19 5.5 6.5 6.0 4.9 5.1 19 227 287 99 42 37
22 15 7.2 6.0 6.0 4.8 5.4 18 218 274 96 40 32
23 19 9.0 7.0 6.0 4.9 5.0 25 158 269 102 41 30
24 19 9.4 7.0 6.0 4.9 5.0 29 129 274 100 42 28
25 19 9.6 8.2 5.0 4.9 5.0 29 120 280 96 42 27
26 18 7.7 7.6 5.1 5.0 5.2 24 136 273 91 40 26
27 22 7.0 6.9 4.6 5.2 5.4 20 134 284 83 38 26
28 21 6.2 7.0 5.1 5.1 5.0 21 155 285 80 34 26
29 21 8.0 7.0 5.0 5.1 5.7 24 219 276 82 32 25
30 20 7.1 7.0 5.0 --- 5.6 31 220 265 73 30 24
31 21 --- 7.0 5.0 --- 5.3 --- 235 --- 67 30 ---

TOTAL 562 333.7 224.9 177.7 158.0 159.1 398.5 3100 7451 4377 1618 818
MEAN 18.1 11.1 7.25 5.73 5.45 5.13 13.3 100 248 141 52.2 27.3
AC-FT 1110 662 446 352 313 316 790 6150 14780 8680 3210 1620
MAX 22 19 8.4 7.0 7.4 5.7 31 235 324 246 76 37
MIN 14 5.5 6.0 4.6 4.8 4.7 5.4 28 129 67 30 20

CAL YR 2007 TOTAL 18101.4 MEAN 50 MAX 287 MIN 5.0 AC-FT 35900
WTR YR 2008 TOTAL 19377.9 MEAN 52.9 MAX 324 MIN 4.6 AC-FT 38440

MAX DISCH: 385 CFS AT 22:45 ON Jun. 2, 2008 GH 2.85 FT. SHIFT 0.02 FT.
MAX GH: 2.85 FT. AT 22:45 ON Jun. 2, 2008

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