GUNNISON RIVER BASIN

09119000 TOMICHI CREEK AT GUNNISON, CO

LOCATION.--Lat 38°31'18", long 106°56'25", in NE14SW14 sec.11, T.49 N., R.1 W., Gunnison County, Hydrologic Unit 14020003, on right bank 300 ft downstream from highway bridge, 1.8 mi southwest of Post Office in Gunnison, and 2.0 mi upstream from mouth.

DRAINAGE AREA.--1,061 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--November and December 1910 (gage heights and discharge measurements only), October 1937 to current year. Monthly discharges only for some periods, published in WSP 1313. Published as "near Gunnison" 1910. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09119000

REVISED RECORDS.--WSP 2124: Drainage area. WDR CO-86-2: 1985.

GAGE.--Water-stage recorder with satellite telemetry and crest-stage gage. Datum of gage is 7,628.58 ft above NGVD of 1929. Nov. 25 to Dec. 24, 1910, nonrecording gage 300 ft upstream at different datum. Apr. 20, 1938 to Oct. 2, 1940, water-stage recorder at present site at datum 1.00 ft higher.

REMARKS.--Records good except for estimated daily discharges, which are poor. Diversions for irrigation of about 24,000 acres upstream from station. Water diverted upstream from station by Larkspur ditch to Arkansas River basin since 1935 and by Tarbell ditch to Rio Grande basin since 1914.

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	38	66	e59	e51	e51	e44	e93	10	558	50	120	72
2	35	65	e57	e53	e51	e43	107	e12	555	51	117	66
3	34	61	e57	e50	e49	e44	103	e11	470	52	107	64
4	23	51	e55	e50	e47	e44	90	e11	379	52	101	67
5	25	51	e54	e51	e47	e44	88	e12	333	52	100	70
6	27	48	e54	e50	e46	e43	78	e11	297	52	89	82
7	27	46	e55	e50	e46	e45	76	e9.8	255	51	87	93
8	26	57	e54	e52	e46	e48	67	e8.7	228	48	87	104
9	29	101	e53	e51	e44	e56	70	e11	202	45	83	106
10	29	107	e53	e50	e44	e69	75	e8.7	200	42	88	184
11	29	86	e52	e51	e46	e82	80	e10	195	41	79	239
12	30	76	e52	e50	e45	e81	84	e8.7	174	38	82	201
13	29	69	e52	e49	e47	e77	82	e12	165	46	85	163
14	29	e69	e50	e49	e50	e78	66	15	164	48	94	148
15	30	e69	e49	e49	e50	e68	78	15	150	47	81	133
16	31	e65	e50	e49	e47	e68	82	18	138	48	74	124
17	32	e70	e51	e47	e48	e64	74	46	130	50	78	109
18	33	e69	e53	e48	e50	e64	70	89	136	54	77	99
19	34	e69	e52	e47	e49	e63	70	157	154	54	83	89
20	38	e70	e51	e46	e48	e61	66	164	165	51	79	88
21	39	e74	e49	e45	e47	e67	59	180	165	61	69	87
22	39	e75	e49	e45	e47	e64	40	178	155	77	67	82
23	45	e77	e48	e45	e45	e74	7.4	208	133	86	67	79
24	51	e73	e47	e46	e48	e77	12	254	108	92	73	77
25	48	e73	e48	e47	e47	e76	11	319	92	95	74	75
26	50	e69	e47	e46	e45	e76	14	369	90	90	85	69
27	52	e62	e47	e46	e45	e72	16	386	72	105	73	65
28	53	e60	e49	e47	e45	e69	15	419	61	139	71	61
29	58	e59	e50	e47	---	e64	14	469	60	167	76	59
30	66	e60	e50	e47	---	e63	9.8	565	52	160	83	49
31	66	---	e50	e49	---	e71	---	550	---	124	79	---
TOTAL	1,175	2,047	1,597	1,503	1,320	1,959	1,797.2	4,536.9	6,036	2,168	2,608	3,004
MEAN	37.9	68.2	51.5	48.5	47.1	63.2	59.9	146	201	69.9	84.1	100
MAX	66	107	59	53	51	82	107	565	558	167	120	239
MIN	23	46	47	45	44	43	7.4	8.7	52	38	67	49
AC-FT	2,330	4,060	3,170	2,980	2,620	3,890	3,560	9,000	11,970	4,300	5,170	5,960
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1938 - 2003, BY WATER YEAR (WY)
MEAN	94.1	101	76.8	67.3	69.6	112	236	392	461	190	160	93.2
MAX	209	158	117	116	98.0	279	564	2,073	1,481	859	440	318
(WY)	(1970)	(1971)	(1987)	(1971)	(1986)	(1939)	(1942)	(1984)	(1984)	(1957)	(1957)	(1970)
MIN	33.5	62.4	45.8	37.1	36.2	59.8	56.5	10.1	24.7	26.8	25.6	19.2
(WY)	(1964)	(1951)	(1964)	(1979)	(1979)	(1981)	(1967)	(2002)	(2002)	(2002)	(2002)	(1956)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1938 - 2003
ANNUAL TOTAL	17,322.4	29,751.1
ANNUAL MEAN	47.5	81.5	171
HIGHEST ANNUAL MEAN			478 1984
LOWEST ANNUAL MEAN			54.2 2002
HIGHEST DAILY MEAN	156 Apr 5	565 May 30	4,040 May 26, 1984
LOWEST DAILY MEAN	e3.4 May 6	7.4 Apr 23	2.6 Sep 30, 1977
ANNUAL SEVEN-DAY MINIMUM	e4.5 May 5	e9.7 May 6	e4.5 May 5, 2002
MAXIMUM PEAK FLOW		617 May 30	4,620 May 23, 1984
MAXIMUM PEAK STAGE		3.23 May 30	5.49 May 23, 1984
ANNUAL RUNOFF (AC-FT)	34,360	59,010	124,100
10 PERCENT EXCEEDS	84	154	375
50 PERCENT EXCEEDS	41	59	97
90 PERCENT EXCEEDS	18	31	52

e Estimated.