ARKANSAS RIVER BASIN

07103980 COTTONWOOD CREEK AT WOODMEN ROAD NEAR COLORADO SPRINGS, CO

LOCATION.--Lat 38°56'22", long 104°44'26", in NE14NE14 sec.11, T.13 S., R.66 W., El Paso County, Hydrologic Unit 11020003, on left bank, 250 ft downstream from Woodmen Road, 4.0 mi east of Interstate 25, 5.0 mi upstream from mouth, and 8.2 mi northeast of courthouse in Colorado Springs.

DRAINAGE AREA.--10.3 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--May 1992 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07103980

REVISED RECORDS.--WDR CO-93-1: Drainage area. WDR CO-96-1: 1995 (M)

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 6,680 ft above NGVD of 1929, from topographic map. Prior to Apr. 13, 1999, at site 150 ft upstream at datum 10 ft higher.

REMARKS.--Records fair except for estimated daily discharges and those above 10 ft3/s, which are poor. Natural flow of stream affected by erosion-control and livestock-watering reservoirs and ground-water withdrawals.

Discharge, cubic feet per second 

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

DAILY MEAN VALUES

DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP
1	1.3	0.38	0.62	0.35	0.34	2.0	0.73	0.70	3.1	0.90	0.45	1.7
2	1.2	1.0	0.53	e0.30	0.36	0.87	0.73	0.90	0.59	0.94	0.26	1.2
3	0.63	0.70	0.57	e0.30	0.66	0.93	0.63	0.74	0.65	0.79	1.5	4.4
4	0.56	0.56	0.40	0.46	e0.56	0.52	0.53	1.3	6.7	0.70	2.3	0.65
5	0.58	0.46	0.34	0.36	e0.52	1.6	1.8	0.69	3.9	0.63	0.35	1.2
6	0.56	0.38	0.33	0.33	e0.48	0.78	1.1	0.78	0.88	0.55	0.33	6.6
7	0.45	0.42	0.34	0.39	e0.46	0.57	0.65	0.72	2.0	0.55	0.26	3.8
8	0.54	0.37	0.29	0.47	e0.40	0.40	0.64	0.59	0.92	0.54	0.27	1.7
9	0.50	0.42	0.25	0.41	e0.50	0.34	0.49	0.58	1.2	0.50	0.53	1.3
10	0.51	0.34	0.30	e0.35	e0.46	0.43	0.38	1.1	0.85	0.44	0.47	0.84
11	0.49	0.32	0.33	e0.30	e0.50	0.58	0.42	0.68	0.71	0.44	0.53	0.88
12	0.50	0.32	0.31	0.58	e0.60	0.55	0.42	0.57	1.2	0.52	0.50	1.0
13	0.51	0.63	0.34	0.61	0.66	0.49	0.52	0.67	1.2	0.48	0.44	0.84
14	0.53	0.59	0.24	0.48	0.60	0.46	0.40	0.62	1.0	0.45	0.36	0.87
15	0.44	0.50	0.20	0.45	0.52	0.55	1.2	1.00	1.0	0.51	0.39	1.0
16	0.35	0.49	0.23	e0.38	0.57	0.50	0.97	0.83	1.2	0.60	0.42	0.83
17	0.37	0.33	0.21	e0.40	0.66	1.4	0.82	0.76	e17	0.61	0.41	0.79
18	0.39	0.25	0.22	e0.30	0.92	1.8	0.61	0.68	e1.2	0.53	1.9	0.91
19	0.38	0.31	e0.20	e0.25	2.6	7.0	1.2	0.60	11	4.4	0.50	0.84
20	0.37	0.33	e0.20	e0.25	1.1	4.2	0.68	0.60	0.90	0.33	0.48	0.68
21	0.31	0.39	0.30	e0.27	0.72	2.4	0.58	0.50	0.54	0.26	0.42	0.63
22	0.35	0.44	e0.25	e0.29	0.44	2.3	2.5	0.50	1.1	0.36	0.52	0.80
23	0.45	0.52	0.30	e0.30	0.68	2.3	3.7	1.2	0.94	0.67	0.48	0.80
24	0.45	0.51	0.27	0.37	0.80	4.4	4.6	0.54	1.00	0.96	0.70	0.70
25	0.47	0.44	e0.30	0.33	1.1	2.2	0.49	0.71	1.5	1.6	0.60	0.60
26	2.4	e0.45	e0.30	0.37	e0.90	1.3	0.49	0.62	4.0	2.3	0.63	0.63
27	1.1	e0.60	0.25	0.38	0.69	0.78	0.44	0.57	0.44	2.5	3.2	0.53
28	0.51	0.59	0.29	0.30	1.1	0.88	0.46	0.65	0.57	11	0.49	0.57
29	0.36	0.57	0.30	0.29	---	1.2	0.51	1.1	0.69	0.59	0.56	0.61
30	0.44	0.52	0.26	0.36	---	0.75	0.62	0.70	0.80	0.53	19	0.65
31	0.54	---	0.28	0.43	---	0.79	---	0.88	---	0.44	14	---
TOTAL	18.54	14.13	9.55	11.41	19.90	45.27	29.31	23.08	68.78	36.62	53.25	38.55
MEAN	0.60	0.47	0.31	0.37	0.71	1.46	0.98	0.74	2.29	1.18	1.72	1.28
MAX	2.4	1.0	0.62	0.61	2.6	7.0	4.6	1.3	17	11	19	6.6
MIN	0.31	0.25	0.20	0.25	0.34	0.34	0.38	0.50	0.44	0.26	0.26	0.53
AC-FT	37	28	19	23	39	90	58	46	136	73	106	76
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1992 - 2003, BY WATER YEAR (WY)
MEAN	1.20	1.06	0.76	0.66	0.80	1.25	1.83	3.09	2.96	2.22	2.38	1.33
MAX	2.59	3.20	1.71	1.36	1.26	3.34	6.42	13.6	8.85	5.07	6.36	2.82
(WY)	(1995)	(1998)	(2000)	(1998)	(1998)	(1998)	(1999)	(1999)	(1995)	(1999)	(1999)	(1995)
MIN	0.35	0.47	0.31	0.33	0.42	0.49	0.50	0.64	0.49	0.24	0.40	0.47
(WY)	(1993)	(1993)	(2003)	(1994)	(1994)	(1995)	(1996)	(1993)	(1994)	(1994)	(2002)	(1992)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1992 - 2003
ANNUAL TOTAL	262.68	368.39
ANNUAL MEAN	0.72	1.01	1.67
HIGHEST ANNUAL MEAN			3.63 1999
LOWEST ANNUAL MEAN			0.65 1993
HIGHEST DAILY MEAN	12 Jul 5	19 Aug 30	e100 Apr 30, 1999
LOWEST DAILY MEAN	0.20 Dec 15	0.20 Dec 15	a0.15 Jan 23, 1995
ANNUAL SEVEN-DAY MINIMUM	0.21 Dec 14	0.21 Dec 14	0.17 Jan 21, 1995
MAXIMUM PEAK FLOW		b511 Jun 17	c1,090 Jul 19, 1993
MAXIMUM PEAK STAGE		d7.07 Jun 17	f5.57 Jul 19, 1993
ANNUAL RUNOFF (AC-FT)	521	731	1,210
10 PERCENT EXCEEDS	1.0	1.6	3.0
50 PERCENT EXCEEDS	0.56	0.56	0.83
90 PERCENT EXCEEDS	0.33	0.30	0.36

e Estimated. a Also occurred Jan 23, Feb 3 (estimated), 1996. b From rating curve extended above 19 ft3/s on basis of velocity-area study. c From rating curve extended above 1.1 ft3/s on basis of slope-area measurement of peak flow at gage height 4.45 ft, site and datum then in use. d From floodmarks. f From floodmarks, site and datum then in use. Maximum gage height, 7.84 ft, May 25, 1999.