GUNNISON RIVER BASIN

09126000 CIMARRON RIVER NEAR CIMARRON, CO

LOCATION.--Lat 38°15'26", long 107°32'46", in NW14NE14 Sec.8, T.46 N., R.6 W., Gunnison County, Hydrologic Unit 14020002, on right bank 0.2 mi upstream from Forest Service bridge, 0.8 mi upstream from headgate on Cimarron ditch, 1.9 mi downstream from Silver Jack Dam, and 13 mi south of Cimarron.

DRAINAGE AREA.--66.6 mi2.

PERIOD OF RECORD.--October 1954 to current year. Prior to October 1965, published as Cimarron Creek near Cimarron. Statistical summary computed for 1971 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09126000

REVISED RECORDS.--WSP 2124: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry and crest-stage gage. Datum of gage is 8,641.48 ft above NGVD of 1929. Oct. 14, 1954 to Oct. 11, 1972 at site 0.4 mi downstream at different datum. Oct. 12, 1972 to Sept. 30, 1996 at site 0.2 mi downstream at datum 10.00 ft lower.

REMARKS.--Records good except for estimated daily discharges, which are poor, and discharges above 800 ft3/s, which are fair. Diversion upstream from station through Owl Creek ditch into Uncompahgre River basin. Flow regulated by Silver Jack Dam, 1.9 mi upstream since Dec. 23, 1970, total capacity, 13,520 acre-ft. 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	29	14	e16	e11	e17	e14	e16	27	943	138	124	99
2	27	14	e16	e11	e16	e14	e16	26	913	130	123	99
3	23	e14	e14	e11	e14	e16	e18	26	862	124	121	103
4	23	e13	e13	e14	e10	e16	e16	31	809	138	127	105
5	23	e14	e11	e12	e11	e18	e15	51	724	153	135	109
6	23	e14	e12	e12	e11	e17	e16	73	617	154	135	107
7	23	e13	e13	e13	e10	e18	e18	73	550	154	131	110
8	23	e13	e14	e15	e10	e18	e20	77	484	152	125	106
9	23	e15	e13	e13	e12	e18	e19	86	506	152	124	112
10	23	e19	e12	e14	e14	e19	19	86	456	153	125	114
11	23	e14	e13	e13	e14	e21	20	85	466	156	121	108
12	22	e13	e13	e12	e15	e19	21	94	454	153	118	102
13	19	e13	e13	e12	e16	e15	23	110	380	152	118	96
14	13	e13	e12	e13	e18	e17	24	111	349	155	118	93
15	13	e14	e12	e13	e17	e15	23	94	391	150	117	92
16	13	e13	e12	e13	e16	e15	22	73	370	149	117	91
17	13	e14	e13	e14	e14	e14	24	126	315	145	118	91
18	13	e15	e15	e13	e16	e13	23	130	292	142	118	92
19	22	e16	e13	e12	e15	e12	21	130	271	142	119	92
20	28	e17	e11	e11	e15	e14	23	130	271	142	117	92
21	28	e18	e13	e11	e15	e14	24	135	245	145	117	65
22	28	e20	e13	e11	e15	e16	25	117	236	148	118	33
23	28	e21	e12	e11	e15	e17	24	68	240	147	120	26
24	28	e17	e13	e11	e17	e19	22	71	206	144	115	20
25	23	e14	e13	e11	e15	e21	26	85	183	142	107	19
26	14	e13	e13	e11	e13	e20	31	95	172	143	103	19
27	14	e12	e11	e13	e14	e18	31	120	171	144	101	19
28	14	e13	e12	e15	e14	e16	32	662	162	138	100	20
29	14	e13	e13	e15	---	e17	30	984	153	124	100	19
30	13	e16	e11	e17	---	e18	28	1,120	147	123	101	19
31	14	---	e11	e17	---	e18	---	1,060	---	124	100	---
TOTAL	637	442	396	395	399	517	670	6,156	12,338	4,456	3,633	2,272
MEAN	20.5	14.7	12.8	12.7	14.2	16.7	22.3	199	411	144	117	75.7
MAX	29	21	16	17	18	21	32	1,120	943	156	135	114
MIN	13	12	11	11	10	12	15	26	147	123	100	19
AC-FT	1,260	877	785	783	791	1,030	1,330	12,210	24,470	8,840	7,210	4,510
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1971 - 2003, BY WATER YEAR (WY)
MEAN	46.1	22.4	16.4	15.0	15.3	16.7	24.4	174	421	212	116	74.7
MAX	135	46.9	31.7	30.0	29.4	35.3	46.5	440	799	640	239	126
(WY)	(1983)	(1986)	(1974)	(1974)	(1986)	(1986)	(1987)	(1996)	(1984)	(1995)	(1983)	(1995)
MIN	20.2	8.18	6.79	2.36	3.03	4.45	8.46	46.5	109	82.7	63.8	32.2
(WY)	(1991)	(1990)	(1978)	(1971)	(1971)	(1971)	(1977)	(1995)	(2002)	(2002)	(2002)	(1977)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1971 - 2003
ANNUAL TOTAL	16,602	32,311
ANNUAL MEAN	45.5	88.5	a96.4
HIGHEST ANNUAL MEAN			180 1984
LOWEST ANNUAL MEAN			40.2 1977
HIGHEST DAILY MEAN	128 May 31	1,120 May 30	1,330 Jun 16, 1995
LOWEST DAILY MEAN	e11 Dec 5	e10 Feb 4	b,c0.00 Dec 24, 1970
ANNUAL SEVEN-DAY MINIMUM	e12 Dec 25	e11 Jan 20	0.00 Dec 24, 1970
MAXIMUM PEAK FLOW		1,620 May 30	d,f1,620 Jun 5, 1997
MAXIMUM PEAK STAGE		3.75 May 30	g3.91 Jun 5, 1997
ANNUAL RUNOFF (AC-FT)	32,930	64,090	69,820
10 PERCENT EXCEEDS	102	153	249
50 PERCENT EXCEEDS	27	21	30
90 PERCENT EXCEEDS	13	13	11

e Estimated. a Average discharge for 16 years (water years 1955-70), 88.6 ft3/s; 64,190 acre-ft/yr, prior to completion of Silver Jack Dam. b Also occurred Dec 25-31, 1970, and Jan 1-9, 1971. Result of storage in Silver Jack Dam. c Minimum daily discharge prior to construction of Silver Jack Dam, 8.0 ft3/s, Dec 27-28, 1962, and Jan 13, 1963. d Also occurred May 30, 2003. f Maximum discharge and stage for period of record, 1,790 ft3/s, Jun 28, 1957, gage height, 8.32 ft, site and datum then in use. g Maximum gage height for statistical period, 6.16 ft, Jun 25, 1971.