DWR_2668867

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

31
PLATTE RIVER BASIN

FALL RIVER AT THE MOUTH NEAR IDAHO SPRINGS, CO

LOCATION.--Lat 39°45'20", long 105°33'24”, in SE1/4, Sec. 28, T.3 S., R.73W., Clear Creek County. Gage is
located on right upstream bank of the box culvert under I70 near the Fall River Road Exit (238)
approximately 20 ft. past Fall River Road.

DRAINAGE AREA AND PERIOD OF RECORD.--Not determined. Gage established July 2007 at present site and datum to
monitor minimum stream flow reach and aid in the administration of water rights.

GAGE.--Data Collection platform (DCP) and Sutron Acububbler stage sensor in a 12” x 30” x 36” NEMA4 shelter at a
concrete box culvert with a steel sill plate. A staff gage located on the right edge of water is the
primary reference with an additional staff gage located on the left edge of water wing wall of the
culvert as backup. There is no backup recording device. A single orifice line in 2-inch ridge conduit
extends from the NEMA4 enclosure and terminates in a gravel packed muffler buried in the stream bed
approximately 5-feet upstream from the steel sill plate. Clear Creek Count is a cooperator.

REMARKS.--Primary record is hourly averages of 15-minute satellite data. Record is complete and reliable for
the period of operation Oct 1–Dec 6, 2007 and April 4-Sept. 30, 2008, except for November 22 through
December 6, 2007, April 4-6, 8, 12 and 13, 2008 when the gage was ice affected; and, Aug 14-Sept 30,
2008, when the bubbler was not functioning properly. During this period, the bubbler was producing
erratic 15-minute values ranging from very low to high values. The gage is a seasonal gage only and no
record is kept during winter periods. Record is fair, except for periods of ice affected and no gage
height record; and the period when the bubbler was not functioning properly, which are poor. The
instantaneous peak of June 1, 2009 is estimated and poor. Station maintained and record developed by
Div 1 Hydrographic Staff.

RATING TABLE.--FALIDACO02 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 17 11 2.5 --- --- --- --- 9.6 67 67 21 26
2 18 10 2.5 --- --- --- --- 7.3 66 64 20 25
3 17 5.9 2.5 --- --- --- --- 8.0 72 62 20 25
4 17 5.6 2.5 --- --- --- 3.5 8.0 71 61 20 24
5 17 5.4 2.5 --- --- --- 3.0 8.4 61 59 23 27
6 17 5.3 2.5 --- --- --- 3.0 9.4 51 58 23 26
7 16 5.2 --- --- --- --- 3.5 11 56 56 20 25
8 16 5.0 --- --- --- --- 3.5 11 54 52 19 26
9 15 3.7 --- --- --- --- 3.5 11 47 47 20 25
10 14 3.6 --- --- --- --- 3.4 12 50 45 21 25
11 14 3.5 --- --- --- --- 3.4 11 54 42 26 25
12 14 3.3 --- --- --- --- 3.5 12 44 41 20 25
13 14 3.2 --- --- --- --- 4.0 14 39 39 21 17
14 15 2.9 --- --- --- --- 4.2 12 41 36 34 13
15 15 2.4 --- --- --- --- 5.5 13 46 32 36 13
16 10 3.2 --- --- --- --- 5.8 12 51 31 29 16
17 12 2.9 --- --- --- --- 4.8 14 52 32 25 21
18 16 2.7 --- --- --- --- 4.7 17 62 31 22 16
19 16 2.7 --- --- --- --- 5.3 25 73 30 19 17
20 13 2.7 --- --- --- --- 6.5 32 73 29 19 16
21 13 1.9 --- --- --- --- 6.8 35 69 28 18 18
22 12 2.0 --- --- --- --- 6.6 34 68 28 17 16
23 14 2.0 --- --- --- --- 7.6 31 69 31 22 16
24 13 2.5 --- --- --- --- 8.4 28 73 32 28 14
25 12 2.5 --- --- --- --- 7.8 27 82 31 27 15
26 12 3.0 --- --- --- --- 6.7 29 81 27 25 16
27 12 3.0 --- --- --- --- 6.8 29 77 25 20 22
28 12 3.0 --- --- --- --- 6.5 30 77 27 16 22
29 11 2.5 --- --- --- --- 7.1 39 75 29 27 22
30 11 2.5 --- --- --- --- 8.3 43 67 24 26 22
31 11 --- --- --- --- --- --- 52 --- 21 26 ---

TOTAL 436 115.1 15.0 --- --- --- 143.7 634.7 1868 1217 710 616
MEAN 14.1 3.84 2.50 --- --- --- 5.32 20.5 62.3 39.3 22.9 20.5
AC-FT 865 228 30 --- --- --- 285 1260 3710 2410 1410 1220
MAX 18 11 2.5 --- --- --- 8.4 52 82 67 36 27
MIN 10 1.9 2.5 --- --- --- 3.0 7.3 39 21 16 13

CAL YR 2007 TOTAL 2272.0 MEAN 15.9 MAX 31 MIN 1.9 AC-FT 4506 (PARTIAL YEAR RECORD)
WTR YR 2008 TOTAL 5755.5 MEAN 23.3 MAX 82 MIN 1.9 AC-FT 11420 (PARTIAL YEAR RECORD)

MAX DISCH: 99.4 CFS AT 21:00 ON Jun. 1, 2008 GH 1.87 FT. SHIFT -0.03 FT.
MAX GH: 1.87 FT. AT 21:00 ON Jun. 1, 2008