SAN JUAN RIVER BASIN

09359010 MINERAL CREEK AT SILVERTON, CO

LOCATION.--Lat 37°48'10", long 107°40'20", in NW14NE14 sec.19, T.41 N., R.7 W., San Juan County, Hydrologic Unit 14080104, on right bank at southwest end of Greene Street at abandoned bridge crossing Mineral Creek, 300 ft downstream from U. S. Highway 550 crossing Mineral Creek, 1,400 ft upstream from mouth, and 0.5 mi southwest of Silverton.

DRAINAGE AREA.--52.5 mi2.

PERIOD OF RECORD.--October 1991 to September 1993, October 1994 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09359010

GAGE.--Water-stage recorder with satellite telemetry. Datum of gage is 9245.98 ft above NGVD of 1929, from San Juan County bench mark.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural regulation by many lakes upstream from station. Diversions upstream from Mineral Creek drainage to Uncompahgre River drainage consists of 100 to 200 acre-feet per year through Red Mountain Ditch and 400 to 500 acre-feet per year through Carbon Lake Ditch. City of Silverton diverts some water from Bear Creek (tributary) for municipal use. 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.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum flood known occurred October 5, 1911. An indirect determination of peak flow for flood of September 5, 1970, was run in very close proximity to present site, discharge, 3,070 ft3/s, gage height not determined.

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	48	31	e24	e16	e14	e14	e25	84	681	126	53	60
2	54	30	e24	e16	e14	e14	e25	82	671	124	51	55
3	55	28	e22	e17	e14	e15	e24	82	597	119	49	51
4	53	27	e22	e17	e14	e15	e23	83	565	111	47	49
5	55	27	e22	e17	e14	e15	e23	70	464	103	44	49
6	55	27	e22	e17	e14	e16	e23	63	370	91	46	54
7	57	27	e21	e17	e15	e16	e22	60	326	86	46	61
8	58	26	e21	e17	e15	e16	e23	56	337	84	47	54
9	57	e27	e21	e17	e15	e16	e24	51	343	81	43	72
10	55	e28	e21	e17	e16	e16	e25	47	337	76	45	102
11	54	e28	e22	e17	e16	e17	31	48	319	73	51	97
12	51	e29	e22	e18	e16	e18	35	66	281	70	52	107
13	48	e29	e21	e19	e16	e18	40	92	225	66	58	127
14	45	e29	e21	e19	e16	e18	52	119	211	63	104	125
15	42	e29	e21	e20	e15	e18	53	151	238	60	78	112
16	40	e29	e21	e20	e14	e17	45	155	211	62	80	105
17	39	e29	e20	e20	e14	e17	44	222	180	62	80	100
18	38	e29	e19	e20	e14	e17	42	229	169	60	71	91
19	36	e28	e18	e20	e14	e17	38	227	180	64	64	82
20	35	e28	e18	e21	e14	e17	38	261	180	59	56	75
21	34	e28	e17	e21	e14	e18	42	318	173	56	53	70
22	34	e28	e17	e21	e14	e18	41	440	189	57	51	65
23	35	e28	e16	e20	e14	e19	38	504	187	54	53	60
24	35	e28	e16	e18	e14	e21	37	483	167	52	57	57
25	32	e27	e16	e18	e14	e22	47	422	149	52	65	54
26	32	e27	e16	e17	e14	e23	65	485	150	50	61	51
27	32	e27	e16	e17	e14	e23	87	725	149	52	62	49
28	31	e26	e16	e16	e14	e23	103	791	143	60	76	47
29	32	e25	e16	e16	---	e23	98	880	135	68	75	45
30	30	e25	e16	e16	---	e23	88	788	130	66	74	44
31	31	---	e16	e15	---	e23	---	681	---	56	68	---
TOTAL	1,333	834	601	557	406	563	1,301	8,765	8,457	2,263	1,860	2,170
MEAN	43.0	27.8	19.4	18.0	14.5	18.2	43.4	283	282	73.0	60.0	72.3
MAX	58	31	24	21	16	23	103	880	681	126	104	127
MIN	30	25	16	15	14	14	22	47	130	50	43	44
AC-FT	2,640	1,650	1,190	1,100	805	1,120	2,580	17,390	16,770	4,490	3,690	4,300
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1992 - 2003, BY WATER YEAR (WY)
MEAN	47.8	31.7	24.8	21.2	19.6	23.6	52.1	246	384	209	109	73.6
MAX	96.4	46.9	34.3	27.1	29.5	36.1	77.4	391	635	540	260	147
(WY)	(1998)	(1998)	(2000)	(1995)	(1995)	(1995)	(2000)	(2001)	(1997)	(1995)	(1999)	(1999)
MIN	26.8	18.0	16.9	13.4	14.5	18.2	35.4	96.5	75.0	25.4	21.9	38.1
(WY)	(2002)	(2002)	(2002)	(1992)	(2003)	(2003)	(1998)	(1995)	(2002)	(2002)	(2002)	(2001)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1992 - 2003
ANNUAL TOTAL	15,340	29,110
ANNUAL MEAN	42.0	79.8	104
HIGHEST ANNUAL MEAN			147 1999
LOWEST ANNUAL MEAN			39.6 2002
HIGHEST DAILY MEAN	192 May 30	880 May 29	964 Jun 4, 1997
LOWEST DAILY MEAN	e13 Mar 1	e14 Feb 1	10 Mar 16, 2001
ANNUAL SEVEN-DAY MINIMUM	14 Feb 27	14 Feb 16	13 Jan 12, 1992
MAXIMUM PEAK FLOW		1,150 May 27	1,670 Jun 15, 1995
MAXIMUM PEAK STAGE		3.05 May 27	3.41 Jun 15, 1995
ANNUAL RUNOFF (AC-FT)	30,430	57,740	75,150
10 PERCENT EXCEEDS	99	176	293
50 PERCENT EXCEEDS	27	40	39
90 PERCENT EXCEEDS	17	16	18

e Estimated.