ARKANSAS RIVER BASIN

07103800 WEST MONUMENT CREEK AT U.S. AIR FORCE ACADEMY, CO

LOCATION.--Lat 38°58'14", long 104°54'08", in SW14SW14 sec.28, T.12 S., R.67 W., El Paso County, Hydrologic Unit 11020003, on Pike National Forest, on left bank 500 ft upstream from diversion to city of Colorado Springs water-treatment plant, 2.7 mi south of U.S. Air Force Academy Chapel, and 4.4 mi upstream from mouth.

DRAINAGE AREA.--14.9 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--May 1970 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07103800

REVISED RECORDS.--WDR CO-99-1: 1997.

GAGE.--Water-stage recorder with satellite telemetry and V-notch sharp-crested weir. Elevation of gage is 7,180 ft above NGVD of 1929, from topographic map.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow of stream affected by storage reservoirs, transmountain diversions, and diversions for municipal use. Flow mostly regulated by Rampart Reservoir 4.5 mi upstream, Nichols Reservoir 3.5 mi upstream, and Northfield Reservoir 2.7 mi upstream. Several measurements of specific conductance and water temperature were obtained and are published in the "Supplemental Water-Quality Data For Gaging Stations" section of this report.

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	0.27	0.27	0.35	0.27	0.27	0.35	0.74	1.2	2.7	3.1	2.9	3.3
2	0.30	0.27	0.35	0.25	0.28	0.35	0.85	1.2	2.8	3.1	2.9	3.2
3	0.29	0.25	0.35	0.21	0.28	0.35	0.87	1.3	2.9	3.1	3.1	3.4
4	0.27	0.26	0.35	0.21	e0.30	0.35	0.81	1.3	3.0	3.1	3.0	3.8
5	0.27	0.27	0.35	0.21	e0.28	0.35	0.74	1.2	3.1	3.2	3.0	4.1
6	0.27	0.27	0.35	0.21	e0.27	0.35	0.73	1.2	3.1	3.2	2.9	4.3
7	0.27	0.27	0.35	0.20	e0.26	0.36	0.68	1.2	3.1	3.2	3.0	4.1
8	0.27	0.27	0.35	0.21	e0.26	0.37	0.62	1.1	3.0	3.1	3.0	3.8
9	0.27	0.27	0.35	0.20	e0.27	0.37	0.64	1.1	3.0	3.1	2.9	3.6
10	0.27	0.27	e0.35	e0.20	e0.28	0.37	0.68	1.1	3.0	3.1	2.9	3.4
11	0.27	0.27	e0.34	e0.20	e0.29	0.37	0.74	1.0	3.0	3.0	2.9	3.4
12	0.27	1.3	e0.33	0.21	e0.30	0.39	0.80	0.97	3.0	3.0	2.8	3.3
13	0.28	0.26	e0.32	0.21	0.32	0.40	0.87	0.92	3.0	2.9	2.8	3.2
14	0.33	0.18	0.31	0.21	0.32	0.41	0.89	0.90	3.1	2.9	3.0	3.2
15	0.32	0.38	0.31	0.21	0.28	0.43	0.89	0.94	3.4	2.9	3.1	3.2
16	0.32	0.40	0.31	e0.20	0.27	0.41	0.81	0.95	3.5	2.9	3.1	3.2
17	0.34	0.40	0.31	e0.20	0.27	0.41	0.80	0.84	3.1	2.8	3.4	3.2
18	0.32	0.38	0.31	e0.20	0.27	0.45	0.78	0.84	2.9	2.9	3.4	3.3
19	0.31	0.40	e0.30	e0.21	0.30	0.45	0.76	0.80	3.0	2.9	3.3	3.3
20	0.31	0.39	e0.30	e0.22	0.31	0.47	0.70	0.78	3.1	2.9	3.4	3.3
21	0.32	0.40	e0.30	0.23	0.31	0.50	0.72	0.74	3.0	2.8	3.5	3.3
22	0.36	0.40	e0.30	0.21	0.31	0.51	0.78	0.71	3.0	2.8	3.6	3.3
23	0.33	0.40	e0.29	e0.20	e0.30	0.61	0.98	0.68	3.0	2.9	3.6	3.3
24	0.31	e0.37	e0.29	e0.21	e0.28	0.67	1.1	0.67	2.9	2.8	3.6	3.3
25	0.31	e0.35	e0.29	0.21	e0.30	0.67	1.4	0.67	3.1	2.9	3.6	3.2
26	0.32	e0.35	e0.28	0.21	e0.32	0.72	1.6	0.64	3.2	3.0	3.5	3.2
27	0.35	e0.35	e0.28	0.24	0.35	0.79	1.5	0.58	3.2	2.9	3.5	3.2
28	0.32	e0.35	e0.28	0.24	0.35	0.68	1.5	0.58	3.2	2.9	3.4	3.2
29	0.31	0.35	e0.27	0.24	---	e0.64	1.4	0.57	3.2	2.9	3.4	3.2
30	0.29	0.35	0.27	0.24	---	e0.61	1.3	1.8	3.2	2.9	3.4	3.1
31	0.27	---	0.27	0.27	---	0.61	---	2.8	---	2.9	3.4	---
TOTAL	9.31	10.70	9.76	6.74	8.20	14.77	27.68	31.28	91.8	92.1	99.3	101.9
MEAN	0.30	0.36	0.31	0.22	0.29	0.48	0.92	1.01	3.06	2.97	3.20	3.40
MAX	0.36	1.3	0.35	0.27	0.35	0.79	1.6	2.8	3.5	3.2	3.6	4.3
MIN	0.27	0.18	0.27	0.20	0.26	0.35	0.62	0.57	2.7	2.8	2.8	3.1
AC-FT	18	21	19	13	16	29	55	62	182	183	197	202
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1970 - 2003, BY WATER YEAR (WY)
MEAN	1.83	1.31	0.94	0.74	0.49	0.55	2.07	6.77	4.40	2.31	2.67	1.74
MAX	11.7	7.74	8.62	8.78	4.21	2.46	12.4	41.2	30.6	23.3	23.8	20.3
(WY)	(1972)	(1971)	(1971)	(1971)	(1999)	(1971)	(1971)	(1999)	(1997)	(1970)	(1970)	(1970)
MIN	0.000	0.000	0.000	0.000	0.000	0.001	0.11	0.20	0.031	0.017	0.000	0.000
(WY)	(1993)	(1993)	(1994)	(1993)	(1976)	(1991)	(1989)	(1976)	(1976)	(1993)	(1993)	(1993)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1970 - 2003
ANNUAL TOTAL	121.06	503.54
ANNUAL MEAN	0.33	1.38	1.93
HIGHEST ANNUAL MEAN			13.4 1971
LOWEST ANNUAL MEAN			0.10 1993
HIGHEST DAILY MEAN	1.3 Nov 12	4.3 Sep 6	e116 Apr 30, 1999
LOWEST DAILY MEAN	0.18 Nov 14	0.18 Nov 14	a0.00 Jan 29, 1976
ANNUAL SEVEN-DAY MINIMUM	0.23 Aug 13	0.20 Jan 5	0.00 Jan 29, 1976
MAXIMUM PEAK FLOW		5.1 Aug 3	b132 Apr 30, 1999
MAXIMUM PEAK STAGE		c1.49 Aug 3	d3.41 Apr 30, 1999
ANNUAL RUNOFF (AC-FT)	240	999	1,400
10 PERCENT EXCEEDS	0.40	3.2	4.2
50 PERCENT EXCEEDS	0.33	0.67	0.53
90 PERCENT EXCEEDS	0.26	0.27	0.07

e Estimated. a No flow many days during 1976, 1991-92. b From rating curve extended above 105 ft3/s. c Maximum gage height, 1.92 ft, Dec. 27, backwater from ice. d From floodmarks, maximum gage height, 3.88 ft, Dec. 22, 1983, backwater from ice.