GREEN RIVER BASIN

09253000 LITTLE SNAKE RIVER NEAR SLATER, CO

LOCATION.--Lat 40°59'58", long 107°08'34", in SW14NW14 sec.15, T.12 N., R.87 W., Routt County, Hydrologic Unit 14050003, on left bank just downstream from highway bridge at Focus Ranch, 0.2 mi downstream from Spring Creek, and 12 mi east of Slater.

DRAINAGE AREA.--285 mi2.

PERIOD OF RECORD.--October 1942 to September 1947, October 1950 to September 1999, April 2001 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09253000

REVISED RECORDS.--WSP 1733: 1960.

GAGE.--Water-stage recorder with satellite telemetry. Datum of gage is 6,831.00 ft above NGVD of 1929.

REMARKS.--Records good except for estimated daily discharges, which are poor. Diversions for irrigation of about 2,000 acres upstream from station. 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	20	23	e26	e29	e33	e28	51	387	2,000	164	27	22
2	22	26	e28	e28	e33	e34	67	332	1,650	162	25	20
3	28	25	e32	e29	e32	e33	66	367	1,270	150	24	19
4	23	20	32	e28	e32	e32	54	420	1,030	137	27	19
5	18	22	29	e28	e32	e30	49	389	860	127	27	19
6	15	19	28	e27	e33	e29	47	326	756	118	24	21
7	14	19	25	e26	e33	e28	47	338	697	111	22	27
8	15	21	24	e26	e34	e33	45	346	559	103	21	27
9	12	27	24	e26	e34	e31	51	325	541	92	21	26
10	9.3	27	26	e26	e32	e35	80	301	550	87	19	31
11	7.8	32	31	e27	e34	e40	124	254	572	80	19	57
12	8.2	27	e32	e28	e33	e44	146	279	501	74	21	48
13	6.8	26	e32	e27	e33	e50	194	437	479	67	22	33
14	6.7	25	e31	e26	e47	e53	291	613	477	63	21	26
15	8.4	29	e32	e26	e40	e54	299	838	419	59	19	23
16	11	28	e32	e25	e36	e49	222	966	394	58	17	21
17	12	32	e32	e26	e34	e49	221	1,150	359	53	20	20
18	13	32	e32	e25	e32	e44	214	1,170	333	50	37	24
19	11	27	e31	e26	e30	43	153	1,140	315	51	36	27
20	13	27	e30	e26	e29	44	187	1,040	323	49	25	25
21	15	26	e30	e26	e29	39	262	1,050	298	51	21	22
22	16	26	e30	e27	e29	40	297	1,080	271	43	20	20
23	22	26	e30	e27	e30	42	302	1,170	256	38	37	19
24	22	25	e30	e28	e30	44	245	1,340	225	36	35	18
25	22	28	e29	e28	e31	47	291	1,430	226	35	27	17
26	21	e26	e29	e28	e31	44	421	1,370	206	34	25	16
27	22	e27	e29	e29	e32	48	428	1,570	182	34	23	17
28	22	e27	e29	e31	e30	64	454	1,700	168	33	21	16
29	24	e26	e29	e32	---	139	518	1,750	159	31	19	16
30	19	e25	e28	e33	---	46	523	1,900	149	33	20	16
31	24	---	e27	e34	---	43	---	1,960	---	30	22	---
TOTAL	503.2	776	909	858	918	1,379	6,349	27,738	16,225	2,253	744	712
MEAN	16.2	25.9	29.3	27.7	32.8	44.5	212	895	541	72.7	24.0	23.7
MAX	28	32	32	34	47	139	523	1,960	2,000	164	37	57
MIN	6.7	19	24	25	29	28	45	254	149	30	17	16
AC-FT	998	1,540	1,800	1,700	1,820	2,740	12,590	55,020	32,180	4,470	1,480	1,410
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1944 - 2003, BY WATER YEAR (WY)
MEAN	38.9	36.1	32.4	31.8	32.7	51.1	262	1,073	925	157	39.0	29.1
MAX	91.8	77.8	59.4	74.5	59.5	139	842	2,122	2,231	519	97.3	80.5
(WY)	(1962)	(1962)	(1983)	(1983)	(1962)	(1989)	(1974)	(1984)	(1983)	(1983)	(1945)	(1997)
MIN	16.2	18.4	14.8	16.3	20.4	23.8	77.6	379	178	26.9	12.9	11.0
(WY)	(2003)	(1959)	(1977)	(1945)	(1945)	(1977)	(1973)	(2002)	(1987)	(2002)	(2002)	(1944)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1944 - 2003
ANNUAL TOTAL	31,221.8	59,364.2
ANNUAL MEAN	85.5	163	228
HIGHEST ANNUAL MEAN			423 1984
LOWEST ANNUAL MEAN			86.4 2002
HIGHEST DAILY MEAN	504 May 1	2,000 Jun 1	3,960 May 24, 1984
LOWEST DAILY MEAN	3.9 Sep 16	6.7 Oct 14	3.9 Sep 16, 2002
ANNUAL SEVEN-DAY MINIMUM	7.7 Sep 20	8.3 Oct 10	6.2 Sep 4, 1988
MAXIMUM PEAK FLOW		2,490 May 31	4,780 May 23, 1984
MAXIMUM PEAK STAGE		7.15 May 31	a8.78 May 23, 1984
ANNUAL RUNOFF (AC-FT)	61,930	117,700	165,100
10 PERCENT EXCEEDS	329	432	815
50 PERCENT EXCEEDS	30	32	40
90 PERCENT EXCEEDS	11	19	21

e Estimated. a Maximum gage height, 9.95 ft, Apr 25, 1974.