GUNNISON RIVER BASIN

09112500 EAST RIVER AT ALMONT, CO

LOCATION.--Lat 38°39'52", long. 106°50'51", in NW14SE14 sec.22, T.51 N., R.1 E., Gunnison County, Hydrologic Unit 14020001, on left bank at Almont, 200 ft upstream from bridge on State Highway 135, and 400 ft upstream from confluence with Taylor River.

DRAINAGE AREA.--289 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--April to October 1905, July 1910 to September 1922, October 1934 to current year. Monthly discharges only for some periods, published in WSP 1313. For a complete listing of historical data available for this site, see http://waterdata. usgs.gov/co/nwis/inventory/?site_no=09112500

REVISED RECORDS.--WSP 1313: 1911. WSP 1733: 1952. WSP 1924: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry. Datum of gage is 8,006.29 ft above NGVD of 1929. Apr. 16 to Sept. 30, 1905, and July 27, 1910 to
Apr. 30, 1922, nonrecording gages at bridge 200 ft downstream, at different datums. Oct. 1, 1934 to Sept. 22, 1954, water-stage recorder at present site
at datum 2.00 ft higher.

REMARKS.--Records good except for estimated daily discharges, which are poor. Diversions for irrigation of about 7,400 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	121	85	e74	e47	e49	e48	68	376	2,310	423	200	105
2	109	88	e69	e55	e49	e46	75	354	2,060	423	194	97
3	102	82	e68	e47	e48	e45	77	346	1,810	e377	200	94
4	101	81	e65	e50	e48	e47	74	358	1,650	e351	199	97
5	98	82	e68	e51	e47	e48	71	332	1,460	e323	188	94
6	102	76	e65	e49	e42	e47	71	271	1,270	e298	180	100
7	100	78	e63	e49	e40	e46	68	248	1,120	e270	176	111
8	96	90	e61	e51	e37	e48	62	234	1,010	e259	172	121
9	96	93	e55	e49	e42	e51	69	227	1,050	257	163	140
10	96	83	e53	e51	e48	49	80	202	1,050	241	161	245
11	95	88	e56	e56	e47	53	104	190	1,020	225	164	204
12	91	81	e63	e56	e49	58	142	188	1,020	202	170	135
13	86	84	e66	e54	e47	58	183	230	983	189	169	153
14	85	90	e60	e49	e54	62	253	280	924	190	171	146
15	83	84	e61	e55	e58	68	296	487	925	190	155	138
16	80	69	e62	e54	e51	70	243	572	937	e188	152	130
17	80	80	e61	e45	e50	67	241	905	828	e190	163	123
18	79	83	e56	e53	e51	63	233	1,070	810	193	153	120
19	76	78	e51	e44	e49	61	198	1,050	779	191	140	114
20	77	81	e46	e49	e47	56	205	1,010	731	187	128	112
21	75	79	e53	e49	e46	64	230	1,080	662	256	122	108
22	77	75	e55	e51	e50	59	253	1,220	650	326	121	97
23	80	75	e44	e51	e49	63	262	1,460	635	290	130	92
24	83	84	e38	e50	e46	67	221	1,620	601	293	127	80
25	80	79	e57	e51	e49	63	233	1,770	517	257	125	77
26	78	64	e53	e49	e48	63	301	1,630	483	252	136	75
27	85	e59	e47	e49	e48	63	379	1,870	459	261	123	74
28	86	e66	e49	e49	e48	56	445	2,120	456	240	122	73
29	88	e72	e49	e49	---	56	440	2,220	445	246	119	72
30	82	e71	e52	e49	---	59	419	2,370	441	218	113	67
31	82	---	e48	e49	---	69	---	2,250	---	183	112	---
TOTAL	2,749	2,380	1,768	1,560	1,337	1,773	5,996	28,540	29,096	7,989	4,748	3,394
MEAN	88.7	79.3	57.0	50.3	47.8	57.2	200	921	970	258	153	113
MAX	121	93	74	56	58	70	445	2,370	2,310	423	200	245
MIN	75	59	38	44	37	45	62	188	441	183	112	67
AC-FT	5,450	4,720	3,510	3,090	2,650	3,520	11,890	56,610	57,710	15,850	9,420	6,730
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1911 - 2003, BY WATER YEAR (WY)
MEAN	117	95.2	73.1	62.2	59.5	68.2	248	1,018	1,353	555	233	130
MAX	279	172	128	102	90.4	137	670	1,978	2,670	2,037	659	271
(WY)	(1912)	(1987)	(1985)	(1985)	(1962)	(1986)	(1936)	(1936)	(1920)	(1957)	(1995)	(1965)
MIN	56.3	47.8	42.0	25.5	28.7	43.1	77.2	222	282	93.5	25.0	52.4
(WY)	(1978)	(1978)	(1977)	(1940)	(1940)	(1976)	(1964)	(1977)	(2002)	(1977)	(1913)	(1977)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1911 - 2003
ANNUAL TOTAL	50,808	91,330
ANNUAL MEAN	139	250	335
HIGHEST ANNUAL MEAN			574 1995
LOWEST ANNUAL MEAN			104 1977
HIGHEST DAILY MEAN	681 Jun 1	2,370 May 30	5,000 Jun 12, 1918
LOWEST DAILY MEAN	32 Sep 6	e37 Feb 8	19 Aug 13, 1913
ANNUAL SEVEN-DAY MINIMUM	35 Sep 1	43 Feb 5	21 Jan 15, 1940
MAXIMUM PEAK FLOW		2,560 May 30	a6,500 Jun 15, 1921
MAXIMUM PEAK STAGE		6.42 May 30	b6.60 Jun 15, 1921
ANNUAL RUNOFF (AC-FT)	100,800	181,200	242,700
10 PERCENT EXCEEDS	350	655	1,040
50 PERCENT EXCEEDS	86	88	108
90 PERCENT EXCEEDS	53	49	55

e Estimated. a Site and datum then in use, from rating curve extended above 3,000 ft3/s. b Maximum gage height 8.41 ft, Jun 18, 1995, present datum.