GUNNISON RIVER BASIN

09146200 UNCOMPAHGRE RIVER NEAR RIDGWAY, CO

LOCATION.--Lat 38°11'02", long 107°44'43", in SW14NE14 sec.4, T.45 N., R.8 W., Ouray County, Hydrologic Unit 14020006, on right bank 15 ft downstream from bridge, 0.2 mi downstream from Dry Creek, 0.5 mi upstream from Dallas Creek, and 2.3 mi north of Ridgway.

DRAINAGE AREA.--149 mi2

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1958 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09146200

REVISED RECORDS.--WSP 2124: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry. Datum of gage is 6,877.58 ft above NGVD of 1929, (levels by U.S. Bureau of Reclamation).

REMARKS.--Records good except for estimated daily discharges, which are poor. Diversions for irrigation upstream from station. Water is imported upstream from station in some years by Red Mountain ditch from Mineral Creek in San Juan River basin.

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	81	60	57	41	41	34	79	170	911	222	116	106
2	90	58	53	43	42	33	80	166	892	218	120	93
3	118	51	54	e40	39	34	70	166	785	208	125	95
4	111	55	51	40	37	34	64	154	709	197	115	94
5	103	53	53	41	37	34	61	131	622	188	101	103
6	95	52	51	40	e36	34	60	113	504	176	98	119
7	92	53	51	40	e36	35	60	103	459	166	98	122
8	89	55	50	42	e36	38	57	94	433	158	98	111
9	86	80	48	41	34	46	66	86	458	170	91	297
10	83	68	47	40	e34	61	82	83	446	169	85	390
11	82	65	46	41	36	74	98	82	424	159	78	206
12	77	60	46	40	35	73	115	107	398	150	78	191
13	74	63	47	39	37	69	120	152	363	143	85	193
14	72	62	46	39	e41	70	143	177	319	137	170	175
15	68	61	47	39	40	59	140	224	354	130	116	161
16	66	56	45	39	37	59	111	235	344	135	119	153
17	65	62	47	37	38	55	122	363	308	139	117	149
18	64	61	49	38	40	54	121	376	284	134	111	140
19	61	60	47	37	39	53	110	336	289	127	98	130
20	59	62	43	36	38	52	104	355	305	125	91	120
21	59	66	46	35	37	58	115	384	282	119	90	111
22	59	67	44	35	37	55	117	540	282	121	89	106
23	62	69	e46	35	35	66	109	664	280	115	125	101
24	60	64	42	36	38	69	99	697	256	111	118	97
25	58	64	e43	38	37	68	124	617	231	112	105	94
26	60	59	e43	36	35	67	175	637	224	120	99	91
27	64	55	e43	36	35	64	211	807	227	112	113	88
28	62	55	e43	37	35	60	222	1,020	228	114	136	86
29	62	57	41	37	---	55	199	1,220	225	142	126	84
30	60	56	41	37	---	54	180	1,110	226	121	146	83
31	62	---	e40	39	---	63	---	942	---	116	123	---
TOTAL	2,304	1,809	1,450	1,194	1,042	1,680	3,414	12,311	12,068	4,554	3,380	4,089
MEAN	74.3	60.3	46.8	38.5	37.2	54.2	114	397	402	147	109	136
MAX	118	80	57	43	42	74	222	1,220	911	222	170	390
MIN	58	51	40	35	34	33	57	82	224	111	78	83
AC-FT	4,570	3,590	2,880	2,370	2,070	3,330	6,770	24,420	23,940	9,030	6,700	8,110
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1959 - 2003, BY WATER YEAR (WY)
MEAN	87.8	67.1	51.8	44.6	45.3	59.3	112	326	576	326	157	108
MAX	153	94.4	67.3	61.5	61.5	102	188	765	914	848	313	250
(WY)	(1985)	(1971)	(1971)	(1997)	(1995)	(1997)	(1985)	(1984)	(1984)	(1983)	(1995)	(1970)
MIN	57.3	48.8	35.8	33.1	32.0	40.5	67.5	122	149	57.1	47.5	52.9
(WY)	(2002)	(1990)	(1977)	(1977)	(1990)	(1964)	(1973)	(1977)	(2002)	(2002)	(2002)	(1959)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1959 - 2003
ANNUAL TOTAL	28,325	49,295
ANNUAL MEAN	77.6	135	164
HIGHEST ANNUAL MEAN			270 1984
LOWEST ANNUAL MEAN			72.6 1977
HIGHEST DAILY MEAN	272 May 31	1,220 May 29	1,740 Jun 24, 1983
LOWEST DAILY MEAN	e35 Mar 20	33 Mar 2	26 Jan 13, 1963
ANNUAL SEVEN-DAY MINIMUM	e40 Mar 15	34 Feb 28	30 Feb 13, 1990
MAXIMUM PEAK FLOW		1,480 May 29	a2,100 Jun 24, 1983
MAXIMUM PEAK STAGE		5.05 May 29	5.73 Jun 24, 1983
ANNUAL RUNOFF (AC-FT)	56,180	97,780	118,600
10 PERCENT EXCEEDS	146	286	423
50 PERCENT EXCEEDS	58	81	79
90 PERCENT EXCEEDS	41	37	43

e Estimated. a From rating curve extended above 1800 ft3/s.