GREEN RIVER BASIN

09242500 ELK RIVER NEAR MILNER, CO

LOCATION.--Lat 40°30'53", long 106°57'12", in NW14NW14 sec.5, T.6 N., R.85 W., Routt County, Hydrologic Unit 14050001, on left bank 30 ft downstream from bridge on County Road 44, 2.5 mi upstream from mouth, and 3.2 mi east of Milner.

DRAINAGE AREA.--460 mi2.

PERIOD OF RECORD.--May 1904 to September 1927 (published as "near Trull"). April 1990 to current year. Records for 1910-27 furnished by State Engineer of Colorado. Monthly discharge 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=09242500

REVISED RECORDS.--WDR CO-98-2:1997 (M). WDR CO-00-2: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 6,590 ft above NGVD of 1929, from topographic map. May 1904 to Sept. 1909, nonrecording gage, at different datum, Oct. 1910 to Sept. 1927, water-stage recorder at different datum.

REMARKS.--Records good except for estimated daily discharges, which are poor. During high flows, channel overflow may occur and cause some streamflow to bypass gage. Diversions upstream from station for irrigation of about 6,500 acres upstream from and about 1,000 acres downstream from station. Natural flow of stream affected by storage in Lester Creek Reservoir (known also as Pearl lake), capacity, 5,660 acre-ft, since 1963, and Steamboat lake, capacity, 23,060 acre-ft, since 1968. 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	85	91	e104	e52	e76	e71	252	1,090	4,960	933	136	68
2	80	96	e103	e54	e79	e71	377	923	4,410	880	124	62
3	124	81	101	e54	e77	e72	360	963	3,730	769	125	57
4	137	72	90	e50	e76	e71	240	1,030	3,150	669	131	56
5	121	91	82	e53	e77	e71	219	987	2,710	616	129	56
6	115	83	84	e53	e72	e70	218	830	2,350	552	116	55
7	112	81	e92	e50	e68	e70	194	814	2,090	498	107	66
8	120	94	91	e48	e77	e76	180	839	1,960	455	107	77
9	125	102	91	e49	e75	e75	225	830	2,220	416	114	71
10	115	98	e85	e52	e70	e83	324	798	2,420	367	127	83
11	112	97	e81	e58	e72	e86	448	731	3,050	330	123	139
12	104	94	e75	e58	e71	e99	548	716	2,680	306	122	120
13	93	97	e75	e57	e75	e108	641	951	2,170	280	124	98
14	90	95	e68	e57	e80	e114	852	1,170	2,170	264	126	83
15	92	91	e75	e56	e78	e126	1,000	1,640	2,270	255	116	73
16	88	83	e69	e53	e72	e132	795	1,960	2,290	244	111	60
17	86	86	e72	e54	e72	e134	724	2,560	1,910	234	120	53
18	83	92	e61	e55	e69	e142	715	2,820	1,780	229	169	64
19	80	96	e52	e53	e72	e158	609	2,550	1,860	252	175	82
20	78	89	e50	e56	e72	122	576	2,430	1,890	263	137	79
21	77	90	e54	e58	e77	128	658	2,540	1,690	276	108	80
22	76	86	e51	e61	e72	131	768	2,740	1,550	227	106	72
23	86	88	e47	e60	e74	148	864	3,010	1,580	198	127	69
24	90	94	e51	e61	e78	227	746	3,600	1,470	184	129	65
25	93	85	e49	e67	e77	200	892	3,900	1,250	174	146	61
26	90	63	e50	e66	e72	210	1,100	3,580	1,010	170	170	57
27	85	78	e52	e66	e74	208	1,180	3,900	996	165	141	62
28	85	e95	e47	e66	e74	169	1,240	4,340	1,060	157	111	62
29	89	e102	e47	e70	---	149	1,330	4,640	1,060	165	106	62
30	88	e104	e49	e75	---	155	1,320	4,640	977	165	97	63
31	85	---	e43	e76	---	160	---	4,540	---	141	85	---
TOTAL	2,984	2,694	2,141	1,798	2,078	3,836	19,595	68,062	64,713	10,834	3,865	2,155
MEAN	96.3	89.8	69.1	58.0	74.2	124	653	2,196	2,157	349	125	71.8
MAX	137	104	104	76	80	227	1,330	4,640	4,960	933	175	139
MIN	76	63	43	48	68	70	180	716	977	141	85	53
AC-FT	5,920	5,340	4,250	3,570	4,120	7,610	38,870	135,000	128,400	21,490	7,670	4,270
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1905 - 2003, BY WATER YEAR (WY)
MEAN	141	110	91.6	87.0	90.0	167	727	2,096	2,165	659	164	112
MAX	424	234	154	135	145	320	1,214	3,977	3,824	1,940	445	518
(WY)	(1919)	(1919)	(1998)	(1998)	(1921)	(1916)	(1919)	(1920)	(1917)	(1917)	(1912)	(1997)
MIN	58.9	58.0	48.8	51.5	45.9	52.0	377	940	749	88.2	30.3	33.1
(WY)	(1993)	(1991)	(1993)	(1992)	(1991)	(1991)	(1995)	(1990)	(2002)	(2002)	(2002)	(1994)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1905 - 2003
ANNUAL TOTAL	85,074.2	184,755
ANNUAL MEAN	233	506	557
HIGHEST ANNUAL MEAN			886 1917
LOWEST ANNUAL MEAN			230 2002
HIGHEST DAILY MEAN	1,900 May 31	4,960 Jun 1	5,350 Jun 15, 1921
LOWEST DAILY MEAN	3.7 Sep 5	e43 Dec 31	3.7 Sep 5, 2002
ANNUAL SEVEN-DAY MINIMUM	5.3 Sep 1	48 Dec 25	5.3 Sep 1, 2002
MAXIMUM PEAK FLOW		5,170 Jun 1	a5,740 Jun 3, 1997
MAXIMUM PEAK STAGE		7.04 Jun 1	b7.18 Jun 3, 1997
ANNUAL RUNOFF (AC-FT)	168,700	366,500	403,500
10 PERCENT EXCEEDS	740	1,730	1,910
50 PERCENT EXCEEDS	81	104	130
90 PERCENT EXCEEDS	43	57	63

e Estimated. a Peak discharge includes 370 ft3/s overflow that bypassed the main channel. b Gage height reflects the discharge flowing in the main channel (5,370 ft3/s).