GREEN RIVER BASIN

09306200 PICEANCE CREEK BELOW RYAN GULCH NEAR RIO BLANCO, CO

LOCATION.--Lat 39°55'16", long 108°17'49", in SE14NE14, sec.32, T.1 S., R.97 W., Rio Blanco County, Hydrologic Unit 14050006, on left bank at downstream side of bridge, 40 ft downstream from Ryan Gulch, and 23 mi northwest of Rio Blanco.

DRAINAGE AREA.--506 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1964 to September 1998, August 1999 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09306200

REVISED RECORDS.--WDR CO-79-3: 1977 (M).

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 6,070 ft above NGVD of 1929, from topographic map.

REMARKS.--Records fair except for estimated daily discharges which are poor. Diversions for irrigation 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	e5.0	7.3	e5.1	e5.9	e7.4	e17	9.4	4.0	8.1	6.2	3.7	4.7
2	e4.9	6.5	e5.4	e5.8	e6.9	e15	8.8	4.3	6.9	5.9	3.3	4.6
3	6.2	6.4	e5.5	e5.3	e7.5	e16	8.9	4.1	5.6	5.8	3.8	4.7
4	5.4	6.4	e5.2	e5.1	e7.9	e15	8.7	4.2	4.4	5.5	3.4	4.1
5	5.0	6.3	e6.1	e5.5	e8.0	e16	9.4	4.9	5.2	5.4	4.1	4.0
6	5.0	6.3	e5.4	e5.8	e8.7	e15	10	3.6	5.0	5.6	3.8	5.0
7	4.9	6.3	e5.8	e5.6	e9.3	e18	11	3.5	4.9	5.9	3.8	5.9
8	4.8	6.3	e5.6	e5.7	e10	e19	9.1	3.8	4.5	5.4	4.1	5.0
9	4.7	7.0	e5.6	e5.5	e11	e11	7.1	3.4	4.3	5.2	4.1	4.8
10	5.7	6.4	e5.0	e5.3	e13	17	6.4	3.1	4.2	5.1	3.9	8.4
11	5.5	5.7	e5.3	e6.0	e13	24	4.4	2.7	4.5	4.7	4.0	9.1
12	e5.4	4.4	e5.0	e5.5	e14	26	2.9	2.9	4.5	4.5	4.2	6.7
13	e5.1	e4.9	e5.3	e5.6	e14	23	3.1	8.4	4.4	4.9	4.3	6.1
14	e5.5	e6.1	e5.0	e6.0	e14	21	3.9	10	4.4	5.4	4.1	5.4
15	e5.8	e5.6	e6.2	e5.9	e16	10	4.9	8.3	e4.1	e6.4	3.4	5.1
16	e5.4	e5.5	e5.1	e5.4	e18	8.2	3.7	8.5	e4.0	e6.5	3.4	3.1
17	5.1	e5.4	e5.1	e5.1	e15	8.3	3.4	9.1	e3.8	e6.8	10	2.5
18	5.2	e5.6	e6.1	e5.3	e14	9.1	3.6	9.5	e3.5	6.7	2.8	2.5
19	4.5	e5.5	e6.0	e5.5	e13	9.4	4.1	9.4	3.1	6.4	4.3	2.9
20	4.1	e5.5	e6.1	e5.2	e12	10	5.0	9.0	3.3	6.3	4.2	3.1
21	4.8	e5.6	e5.9	e4.6	e12	11	4.4	7.8	3.3	5.8	4.3	3.0
22	4.8	e5.6	e5.7	e6.1	e10	9.5	3.4	7.2	3.2	5.4	4.2	3.2
23	5.4	e5.5	e5.4	e5.7	e10	9.2	3.4	6.5	3.4	5.1	4.4	3.5
24	5.8	e5.4	e5.6	e6.0	e12	9.4	3.1	5.9	3.6	5.0	4.7	3.8
25	5.0	e5.5	e5.1	e5.6	e15	8.0	3.5	5.2	3.8	5.2	4.8	4.1
26	5.1	e5.7	e5.0	e4.9	e13	7.8	4.4	6.6	3.9	4.0	4.7	4.2
27	4.1	e6.2	e5.5	e5.4	e16	8.6	3.8	7.1	3.7	3.8	4.7	4.2
28	4.2	e5.3	e5.8	e5.5	e15	8.7	3.6	6.0	3.3	3.2	5.2	4.3
29	4.6	e5.0	e5.7	e5.5	---	8.6	3.6	6.3	4.1	2.8	5.0	4.9
30	6.1	e5.1	e5.6	e6.2	---	8.0	4.0	7.6	5.9	2.8	5.0	5.5
31	7.5	---	e5.5	e6.0	---	8.0	---	7.5	---	2.9	4.9	---
TOTAL	160.6	174.3	170.7	172.5	335.7	404.8	165.0	190.4	130.9	160.6	134.6	138.4
MEAN	5.18	5.81	5.51	5.56	12.0	13.1	5.50	6.14	4.36	5.18	4.34	4.61
MAX	7.5	7.3	6.2	6.2	18	26	11	10	8.1	6.8	10	9.1
MIN	4.1	4.4	5.0	4.6	6.9	7.8	2.9	2.7	3.1	2.8	2.8	2.5
AC-FT	319	346	339	342	666	803	327	378	260	319	267	275
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1965 - 2003, BY WATER YEAR (WY)
MEAN	21.0	25.3	23.6	21.0	24.2	33.3	45.2	63.6	30.8	22.9	28.8	20.7
MAX	69.9	58.4	60.9	55.5	61.0	112	228	326	166	98.7	95.6	65.2
(WY)	(1986)	(1986)	(1984)	(1984)	(1986)	(1986)	(1986)	(1985)	(1983)	(1984)	(1984)	(1984)
MIN	2.75	5.81	5.51	5.56	12.0	11.5	2.94	3.65	3.51	3.95	2.69	3.94
(WY)	(1965)	(2003)	(2003)	(2003)	(2003)	(1972)	(1967)	(1967)	(1967)	(1967)	(1994)	(1981)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1965 - 2003
ANNUAL TOTAL	3,229.7	2,338.5
ANNUAL MEAN	8.85	6.41	30.1
HIGHEST ANNUAL MEAN			96.5 1985
LOWEST ANNUAL MEAN			6.41 2003
HIGHEST DAILY MEAN	e22 Feb 23	26 Mar 12	534 May 5, 1985
LOWEST DAILY MEAN	2.3 May 15	2.5 Sep 17	0.15 Jun 7, 1981
ANNUAL SEVEN-DAY MINIMUM	2.9 May 9	2.9 Sep 16	0.96 Apr 27, 1966
MAXIMUM PEAK FLOW		43 Aug 17	550 May 5, 1985
MAXIMUM PEAK STAGE		4.05 Aug 17	a7.70 May 5, 1985
ANNUAL RUNOFF (AC-FT)	6,410	4,640	21,780
10 PERCENT EXCEEDS	17	10	59
50 PERCENT EXCEEDS	7.4	5.4	20
90 PERCENT EXCEEDS	5.0	3.6	6.0

e Estimated. a Maximum gage height, 7.95 ft, May 5, 1998.