GREEN RIVER BASIN

09246200 ELKHEAD CREEK ABOVE LONG GULCH NEAR HAYDEN, CO

LOCATION.--Lat 40°35'30", long 107°19'13", in NW14SE14 sec.1, T.7 N., R.89 W., Routt County, Hydrologic Unit 14050001, on left bank 0.3 mi upstream from Long Gulch, and 9.0 mi northwest of Hayden.

DRAINAGE AREA.--171 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--August 1995 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09246200

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage 6,405 ft above NGVD of 1929, from topographic map.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow affected by diversions for irrigation of several hundred acres upstream from station.

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	1.4	3.7	4.0	e5.8	e9.0	e11	138	428	416	15	1.5	0.60
2	2.1	5.0	4.1	e6.3	e9.9	e10	141	339	315	13	1.1	0.36
3	3.3	3.1	4.8	e6.6	e11	e11	114	421	227	11	0.66	0.32
4	5.8	2.0	4.4	e6.7	e10	e11	59	489	183	10	0.69	0.40
5	5.6	2.8	4.2	e6.8	e9.5	e11	52	457	151	8.0	0.69	0.29
6	4.1	3.2	4.1	e6.8	e8.7	e11	46	336	130	7.4	0.49	0.26
7	3.3	3.2	4.3	e6.6	e8.3	e12	35	343	120	7.3	0.39	0.58
8	2.9	4.5	6.2	e6.6	e8.3	e12	31	344	106	5.8	0.34	2.1
9	2.4	4.9	5.6	e6.7	e9.6	e13	58	354	96	5.0	0.24	3.2
10	1.9	5.4	3.9	e6.9	e11	e17	130	317	93	4.9	0.11	3.5
11	1.6	3.7	2.9	e7.2	e12	e24	191	275	102	4.5	0.07	6.9
12	1.4	4.3	2.9	e7.3	e10	e27	261	282	93	4.8	0.05	7.8
13	1.2	4.8	3.3	e7.3	e11	e25	305	485	78	4.7	0.04	4.6
14	1.1	6.2	3.1	e7.3	e15	e28	399	631	69	4.3	0.02	2.9
15	1.1	5.0	3.7	e7.2	e16	e27	443	916	62	5.6	0.01	2.1
16	1.2	4.5	3.6	e7.1	e15	38	311	932	52	5.1	0.01	1.6
17	1.1	4.7	3.6	e7.1	e19	37	e260	1,030	53	4.5	0.01	1.2
18	1.3	7.1	4.8	e7.1	e20	32	e240	946	47	3.9	0.02	1.0
19	1.9	4.5	5.7	e7.2	e14	28	e200	770	44	3.3	0.01	0.93
20	1.7	4.5	e4.9	e7.6	e12	34	e170	676	47	3.1	0.01	0.81
21	1.7	4.6	e5.2	e7.9	e11	39	251	651	49	2.9	0.01	0.87
22	1.7	4.7	e5.0	e8.0	e11	48	333	641	42	2.4	0.61	0.86
23	2.6	5.0	e5.2	e8.1	e11	68	422	631	37	1.9	1.2	0.83
24	3.9	7.5	e5.5	e8.5	e11	109	278	667	35	1.6	2.4	0.79
25	6.0	5.0	e5.7	e8.2	e11	62	598	641	32	1.3	2.3	0.73
26	5.7	4.3	e5.7	e8.0	e11	59	767	571	31	1.1	2.7	0.83
27	4.6	3.1	e5.6	e8.0	e11	64	627	543	29	1.1	1.7	0.79
28	4.2	3.7	e5.5	e7.9	e11	33	578	518	25	1.0	1.2	0.75
29	4.0	3.4	e5.6	e8.0	---	29	643	483	22	1.2	0.85	0.79
30	4.2	4.0	e5.7	e8.0	---	26	639	438	19	0.79	0.58	0.74
31	4.5	---	e5.5	e8.4	---	36	---	400	---	0.87	0.53	---
TOTAL	89.5	132.4	144.3	227.2	327.3	992	8,720	16,955	2,805	147.36	20.54	49.43
MEAN	2.89	4.41	4.65	7.33	11.7	32.0	291	547	93.5	4.75	0.66	1.65
MAX	6.0	7.5	6.2	8.5	20	109	767	1,030	416	15	2.7	7.8
MIN	1.1	2.0	2.9	5.8	8.3	10	31	275	19	0.79	0.01	0.26
AC-FT	178	263	286	451	649	1,970	17,300	33,630	5,560	292	41	98
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1995 - 2003, BY WATER YEAR (WY)
MEAN	10.8	12.5	12.2	13.5	15.7	69.2	349	629	139	13.1	4.34	7.03
MAX	39.5	33.2	34.0	34.5	39.3	151	493	1,189	337	42.5	13.5	37.6
(WY)	(1998)	(1998)	(1998)	(1998)	(1998)	(1998)	(1998)	(1997)	(1997)	(1998)	(1997)	(1997)
MIN	2.66	4.41	4.65	5.66	6.74	18.1	162	78.9	5.24	0.032	0.000	0.004
(WY)	(2002)	(2003)	(2003)	(2002)	(2002)	(2002)	(2002)	(2002)	(2002)	(2002)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1995 - 2003
ANNUAL TOTAL	8,742.60	30,610.03
ANNUAL MEAN	24.0	83.9	107
HIGHEST ANNUAL MEAN			187 1997
LOWEST ANNUAL MEAN			24.0 2002
HIGHEST DAILY MEAN	267 Apr 16	1,030 May 17	1,860 May 7, 1997
LOWEST DAILY MEAN	0.00 Jul 8	0.01 Aug 15	a0.00 Jul 8, 2002
ANNUAL SEVEN-DAY MINIMUM	0.00 Jul 16	0.01 Aug 15	0.00 Jul 16, 2002
MAXIMUM PEAK FLOW		1,450 Apr 25	b2,760 May 7, 1997
MAXIMUM PEAK STAGE		6.04 Apr 25	7.86 May 7, 1997
ANNUAL RUNOFF (AC-FT)	17,340	60,710	77,280
10 PERCENT EXCEEDS	96	341	352
50 PERCENT EXCEEDS	5.0	6.9	12
90 PERCENT EXCEEDS	0.00	0.80	1.4

e Estimated. a Also occurred Jul 9 and Jul 16 to Sep 29, 2002. b From rating extended above 1,120 ft3/s.