ARKANSAS RIVER BASIN

07099990 FOUNTAIN CREEK AT GREEN MOUNTAIN FALLS, CO

LOCATION.--Lat 38°56'20", long 105°00'55", in NW14NE14 sec.8, T.13 S., R.68 W., El Paso County, Hydrologic Unit 11020003, on left bank at upstream side of bridge on Green Mountain Falls Road at Green Mountain Falls, 0.2 mi south of U.S. Highway 24, 0.4 mile upstream from North Catamount Creek, and 1.3 miles downstream from Crystola Creek.

DRAINAGE AREA.--16.6 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--April 2001 to current year. Site was part of a hydrologic study, water-quality data available, May 1986 to September 1989, published as "Fountain Creek above Green Mountain Falls" (station 385620105005401). For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07099990

GAGE.--Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 7,740 ft above NGVD of 1929, from topographic map.

REMARKS.--Records fair except for estimated daily discharges, which are poor. Natural flow of stream affected by storage reservoirs, diversions for irrigation, ground-water withdrawals, and return flows from irrigated areas. 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	0.61	0.65	0.54	0.56	0.66	e0.67	0.78	1.6	1.4	1.4	0.98	0.66
2	0.68	0.69	0.55	0.60	0.69	e0.66	0.77	1.6	1.2	1.0	1.1	0.62
3	0.65	0.71	0.56	0.56	e0.68	0.65	0.76	1.6	1.0	1.1	0.94	2.5
4	0.64	0.68	0.55	0.56	e0.66	e0.64	0.72	1.5	1.0	0.89	1.00	0.63
5	0.67	0.72	0.57	0.56	e0.65	e0.66	0.71	1.4	1.3	0.78	1.0	0.52
6	0.75	0.73	0.57	0.56	e0.65	0.70	0.71	1.4	1.1	0.69	1.0	0.53
7	0.77	0.75	0.57	0.56	e0.63	0.66	0.67	1.4	1.0	0.71	0.96	2.3
8	0.80	0.77	0.54	0.61	e0.65	0.69	0.70	1.3	0.97	0.57	1.0	0.60
9	0.80	0.78	0.55	e0.62	e0.67	0.67	0.80	1.3	0.88	0.50	1.2	0.42
10	0.76	0.77	0.61	e0.62	e0.68	0.66	1.2	1.3	0.86	0.68	0.74	0.47
11	0.65	0.71	0.57	0.62	e0.68	0.73	1.6	1.3	0.78	0.45	0.86	0.43
12	0.63	0.66	0.58	e0.62	0.65	0.79	2.0	1.2	0.80	0.46	0.65	0.38
13	0.64	0.68	0.55	0.61	0.66	0.90	2.8	1.2	0.78	0.51	0.48	0.35
14	0.63	0.72	0.54	0.61	0.71	0.92	2.8	1.2	0.84	0.50	0.42	0.34
15	0.63	0.66	0.54	0.59	0.71	0.92	2.6	1.2	0.78	0.54	0.45	0.36
16	0.64	0.64	0.54	e0.59	e0.69	0.89	2.5	1.3	0.75	0.50	0.48	0.40
17	0.64	0.63	0.56	e0.59	e0.70	0.92	2.5	1.3	0.90	0.52	0.47	0.45
18	0.63	0.63	0.55	e0.59	0.72	1.3	2.4	1.2	1.1	0.55	0.93	0.41
19	0.64	0.60	e0.54	0.59	e0.70	1.2	2.3	1.2	0.92	1.0	0.40	0.34
20	0.67	0.59	e0.53	0.58	e0.68	0.79	2.3	1.2	1.00	0.29	0.43	0.35
21	0.68	0.60	0.55	0.57	e0.69	0.75	2.7	1.2	0.81	0.28	0.40	0.30
22	0.70	0.61	e0.52	0.56	e0.70	0.78	2.8	1.2	0.89	0.29	0.34	0.37
23	0.72	0.61	e0.52	0.58	e0.68	0.88	2.6	1.1	0.87	0.39	0.39	0.34
24	0.72	0.60	e0.51	0.58	e0.65	0.92	2.5	1.1	0.82	0.34	1.1	0.36
25	0.74	0.57	e0.52	0.58	e0.64	0.95	2.3	1.2	0.89	0.32	0.30	0.40
26	0.75	0.57	e0.55	0.60	0.65	0.94	2.0	1.2	3.0	0.33	0.35	0.46
27	0.84	0.63	e0.57	0.62	0.67	0.86	1.8	1.1	1.5	0.33	0.45	0.52
28	0.82	0.56	0.58	0.64	e0.67	0.70	1.8	1.1	1.1	0.40	0.55	0.50
29	0.78	0.56	0.58	0.64	---	0.90	1.8	1.2	1.2	0.63	0.66	0.48
30	0.66	0.55	0.56	0.64	---	0.85	1.8	1.2	1.9	1.0	0.65	0.49
31	0.64	---	0.57	0.65	---	0.76	---	1.9	---	1.0	0.95	---
TOTAL	21.58	19.63	17.14	18.46	18.87	25.31	53.72	40.2	32.34	18.95	21.63	17.28
MEAN	0.70	0.65	0.55	0.60	0.67	0.82	1.79	1.30	1.08	0.61	0.70	0.58
MAX	0.84	0.78	0.61	0.65	0.72	1.3	2.8	1.9	3.0	1.4	1.2	2.5
MIN	0.61	0.55	0.51	0.56	0.63	0.64	0.67	1.1	0.75	0.28	0.30	0.30
AC-FT	43	39	34	37	37	50	107	80	64	38	43	34
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 2001 - 2003, BY WATER YEAR (WY)
MEAN	0.80	0.84	0.75	0.79	0.81	1.03	1.96	1.79	1.11	0.89	0.83	0.65
MAX	0.90	1.03	0.95	0.98	0.95	1.24	2.58	3.08	1.66	1.60	1.32	0.88
(WY)	(2002)	(2002)	(2002)	(2002)	(2002)	(2002)	(2001)	(2001)	(2001)	(2001)	(2001)	(2001)
MIN	0.70	0.65	0.55	0.60	0.67	0.82	1.50	1.01	0.59	0.44	0.48	0.50
(WY)	(2003)	(2003)	(2003)	(2003)	(2003)	(2003)	(2002)	(2002)	(2002)	(2002)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 2001 - 2003
ANNUAL TOTAL	291.65	305.11
ANNUAL MEAN	0.80	0.84	0.86
HIGHEST ANNUAL MEAN			0.88 2002
LOWEST ANNUAL MEAN			0.84 2003
HIGHEST DAILY MEAN	2.3 Apr 1	3.0 Jun 26	8.1 Jul 13, 2001
LOWEST DAILY MEAN	0.38 Jun 30	0.28 Jul 21	0.28 Jul 21, 2003
ANNUAL SEVEN-DAY MINIMUM	0.42 Jul 27	0.32 Jul 20	0.32 Jul 20, 2003
MAXIMUM PEAK FLOW		a57 Sep 3	b183 Jul 13, 2001
MAXIMUM PEAK STAGE		5.09 Sep 3	6.43 Jul 13, 2001
ANNUAL RUNOFF (AC-FT)	578	605	622
10 PERCENT EXCEEDS	1.2	1.3	1.3
50 PERCENT EXCEEDS	0.68	0.67	0.78
90 PERCENT EXCEEDS	0.44	0.46	0.45

e Estimated. a From rating curve extended above 3.9 ft3/s on basis of slope-conveyance measurement of peak flow. b From slope-conveyance measurement of peak flow.