GUNNISON RIVER BASIN

09152500 GUNNISON RIVER NEAR GRAND JUNCTION, CO

LOCATION.--Lat 38°59'00", long 108°27'00", in NE14SW14 of sec.14, T.2 S., R.1 E., Ute Meridian, Mesa County, Hydrologic Unit 14020005, on right bank 180 ft upstream from bridge on State Highway 141, 0.4 mi downstream from Whitewater Creek, 0.5 mi south of Whitewater, and 8 mi southeast of Grand Junction.

DRAINAGE AREA.--7,928 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1894 to December 1895 (gage heights only), October 1896 to September 1899, October 1901 to October 1906, October 1916 to current year. Monthly discharge only for some periods, published in WSP 1313. Published as "at Whitewater" 1901-06. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09152500

REVISED RECORDS.--WSP 509: Drainage area at former site. WSP 2124: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry and crest-stage gage. Datum of gage is 4,628.12 ft above NGVD of 1929. See WSP 1733 or 1924 for history of changes prior to October 1959.

REMARKS.--No estimated daily discharges. Records good. Records show flow that enters Colorado River from Gunnison River basin except for about
60 ft3/s diverted downstream from gage during irrigation season. Natural flow of river affected by diversions for irrigation of about 233,000 acres upstream from station, storage reservoirs, and return flow from irrigated lands.

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	1,240	994	752	666	612	595	746	1,810	5,410	879	997	1,160
2	1,190	976	758	653	620	585	746	1,700	5,580	890	970	1,140
3	1,590	948	740	638	618	582	808	1,690	4,970	919	997	1,100
4	1,620	927	727	658	611	578	790	1,820	4,270	964	1,040	987
5	1,360	918	730	678	594	593	722	1,910	3,700	984	1,020	997
6	1,320	900	736	667	598	593	685	1,660	3,110	975	966	1,290
7	1,300	911	735	650	564	596	632	1,450	2,590	1,020	953	1,470
8	1,280	882	722	628	530	583	606	1,400	2,350	988	999	1,510
9	1,260	932	706	624	548	577	547	1,350	2,270	919	1,020	1,480
10	1,220	1,000	693	635	580	590	479	1,330	2,090	910	998	2,600
11	1,200	956	692	652	590	604	482	1,290	1,870	923	980	2,870
12	1,160	905	687	658	588	622	674	1,230	1,730	1,010	961	2,010
13	1,150	878	695	640	611	651	869	1,410	1,650	1,010	956	1,780
14	1,160	869	703	625	622	692	1,080	1,680	1,590	1,020	942	1,760
15	1,150	897	706	628	666	727	1,500	2,130	1,420	1,030	1,040	1,720
16	1,110	859	708	623	647	716	1,470	2,880	1,390	1,000	1,080	1,650
17	1,080	828	717	603	621	729	1,170	3,300	1,350	1,010	1,160	1,540
18	1,060	819	733	599	613	725	1,150	3,730	1,290	1,010	1,160	1,400
19	1,020	837	710	588	620	702	1,140	4,750	1,300	1,000	1,140	1,340
20	995	815	688	593	593	678	998	4,640	1,320	1,020	1,010	1,310
21	979	799	680	609	588	663	894	4,620	1,370	1,050	967	1,250
22	966	808	695	609	577	662	978	4,560	1,220	998	1,000	1,180
23	980	810	673	614	576	642	1,300	4,720	1,140	947	1,080	1,090
24	1,210	811	670	612	578	659	1,340	4,660	1,210	979	1,200	998
25	1,120	810	682	609	588	737	1,170	4,450	942	998	1,210	961
26	1,040	799	705	603	606	785	1,350	4,330	828	1,080	1,140	970
27	1,040	770	662	599	612	737	1,900	4,200	834	1,030	1,060	983
28	1,050	741	661	600	614	763	2,340	4,090	902	1,110	1,070	953
29	1,040	720	700	604	---	819	2,380	4,560	942	1,130	1,090	939
30	1,070	737	691	605	---	811	2,080	5,060	913	1,060	1,100	929
31	1,020	---	675	606	---	821	---	5,420	---	976	1,150	---
TOTAL	35,980	25,856	21,832	19,376	16,785	20,817	33,026	93,830	61,551	30,839	32,456	41,367
MEAN	1,161	862	704	625	599	672	1,101	3,027	2,052	995	1,047	1,379
MAX	1,620	1,000	758	678	666	821	2,380	5,420	5,580	1,130	1,210	2,870
MIN	966	720	661	588	530	577	479	1,230	828	879	942	929
AC-FT	71,370	51,290	43,300	38,430	33,290	41,290	65,510	186,100	122,100	61,170	64,380	82,050
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1897 - 2003, BY WATER YEAR (WY)
MEAN	1,477	1,452	1,348	1,261	1,260	1,447	3,056	7,321	6,892	2,513	1,393	1,383
MAX	3,479	3,303	3,225	3,515	3,844	4,114	9,184	18,870	19,630	11,950	3,639	4,959
(WY)	(1987)	(1987)	(1987)	(1974)	(1974)	(1997)	(1942)	(1920)	(1957)	(1995)	(1957)	(1929)
MIN	268	497	500	500	500	500	580	698	577	165	153	267
(WY)	(1935)	(1899)	(1899)	(1899)	(1899)	(1903)	(1977)	(1977)	(1934)	(1934)	(1934)	(1934)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1897 - 2003
ANNUAL TOTAL	358,466	433,715
ANNUAL MEAN	982	1,188	2,570
HIGHEST ANNUAL MEAN			5,187 1984
LOWEST ANNUAL MEAN			838 1934
HIGHEST DAILY MEAN	1,700 Apr 12	5,580 Jun 2	35,200 May 23, 1920
LOWEST DAILY MEAN	661 Dec 28	479 Apr 10	106 Jul 20, 1934
ANNUAL SEVEN-DAY MINIMUM	678 Dec 22	571 Feb 6	116 Jul 14, 1934
MAXIMUM PEAK FLOW		5,990 Jun 2	a35,700 May 23, 1920
MAXIMUM PEAK STAGE		6.36 Jun 2	14.95 May 23, 1920
ANNUAL RUNOFF (AC-FT)	711,000	860,300	1,862,000
10 PERCENT EXCEEDS	1,210	1,840	6,000
50 PERCENT EXCEEDS	976	961	1,360
90 PERCENT EXCEEDS	746	605	704

a Site and datum then in use, from rating curve extended above 22,000 ft3/s.