WILLIAMS FORK BASIN

09038500 WILLIAMS FORK BELOW WILLIAMS FORK RESERVOIR, CO

LOCATION.--Lat 40°02'07", long 106°12'17", in NW14SE14 sec.23, T.1 N., R.79 W., Grand County, Hydrologic Unit 14010001, on left bank 400 ft downstream from Williams Fork Reservoir, 2.1 mi upstream from mouth, and 2.1 mi southwest of Parshall.

DRAINAGE AREA.--230 mi2.

PERIOD OF RECORD.--October 1948 to September 1954, August 1958 to current year. Monthly discharge only for some periods, published in WSP 1313. Prior to October 1958, published as Williams River below Williams Fork Reservoir. Water-quality data available, April 1986 to September 1987. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09038500.

REVISED RECORDS.--WSP 2124: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry, and concrete control. Datum of gage is 7,615.0 ft above NGVD of 1929, (Denver Board of Water Commissioners Datum). See WSP 1713 or 1733 for history of changes prior to Oct. 21, 1959.

REMARKS.--No estimated daily discharges. Records good. Flow completely regulated by Williams Fork Reservoir (station 09038000). Transmountain diversion upstream from station through August P. Gumlick Tunnel (station 09036000). Diversions upstream from station for irrigation of about 3,200 acres and about 100 acres downstream from station. About 450 acres upstream from station irrigated by diversion into the drainage area. Several measurements of specific conductance and water temperature were obtained and are published in the "Supplemental Water-Quality 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	138	154	111	67	34	38	35	15	16	15	222	183
2	138	155	113	65	34	37	35	15	17	16	210	183
3	138	156	113	65	34	37	41	15	15	29	189	203
4	138	154	112	65	34	37	37	15	15	37	179	232
5	138	140	112	65	34	37	40	15	17	39	203	214
6	138	132	111	65	34	37	52	15	17	40	221	183
7	138	132	111	65	34	37	56	16	16	103	222	183
8	180	132	111	65	34	37	56	17	16	199	227	193
9	206	133	91	65	34	37	56	17	16	169	236	220
10	204	133	77	64	34	37	44	17	17	184	238	253
11	204	132	77	65	34	37	24	17	17	251	210	248
12	204	132	77	66	34	37	24	17	17	245	199	239
13	204	132	78	66	34	37	24	17	17	235	217	282
14	151	132	78	66	34	35	21	17	17	250	217	316
15	123	132	77	66	34	33	14	16	17	277	213	316
16	123	132	77	66	34	35	14	16	17	274	212	309
17	123	131	77	66	34	46	15	17	17	278	229	281
18	123	132	77	66	34	51	15	17	16	278	241	226
19	123	111	77	66	34	50	14	17	15	279	241	188
20	123	134	77	66	34	50	14	17	16	280	242	174
21	123	101	77	66	34	50	14	17	16	157	245	183
22	123	48	77	65	34	51	14	16	16	51	239	194
23	123	38	77	46	34	51	14	17	17	60	236	216
24	123	80	77	37	37	51	14	17	17	129	236	215
25	123	77	77	35	39	53	14	17	15	210	238	212
26	123	101	77	35	39	51	15	17	16	268	240	196
27	123	134	71	35	38	46	15	17	16	266	237	183
28	123	133	68	35	38	47	15	18	15	240	235	183
29	123	123	68	35	---	48	15	17	15	234	234	185
30	123	111	68	35	---	39	15	15	15	269	234	188
31	141	---	67	34	---	35	---	15	---	253	202	---
TOTAL	4,428	3,667	2,638	1,768	973	1,304	776	508	486	5,615	6,944	6,581
MEAN	143	122	85.1	57.0	34.8	42.1	25.9	16.4	16.2	181	224	219
MAX	206	156	113	67	39	53	56	18	17	280	245	316
MIN	123	38	67	34	34	33	14	15	15	15	179	174
AC-FT	8,780	7,270	5,230	3,510	1,930	2,590	1,540	1,010	964	11,140	13,770	13,050
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2003, BY WATER YEAR (WY)
MEAN	129	132	104	102	89.9	93.2	79.2	111	199	169	159	155
MAX	264	276	251	264	279	265	273	401	1,007	782	352	342
(WY)	(1979)	(1979)	(1966)	(1984)	(1966)	(1966)	(1986)	(1952)	(1952)	(1983)	(1981)	(1981)
MIN	23.5	36.7	13.5	14.7	7.88	14.1	6.04	6.29	10.8	7.97	19.2	17.1
(WY)	(1988)	(1995)	(1983)	(1983)	(1995)	(1983)	(1960)	(1960)	(1961)	(1963)	(1986)	(1986)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1949 - 2003
ANNUAL TOTAL	41,907	35,688
ANNUAL MEAN	115	a165	a129
HIGHEST ANNUAL MEAN			b254 1984
LOWEST ANNUAL MEAN			39.1 1959
HIGHEST DAILY MEAN	287 Jun 29	316 Sep 14	1,860 Jun 28, 1983
LOWEST DAILY MEAN	14 May 8	14 Apr 15	c0.30 May 14, 1963
ANNUAL SEVEN-DAY MINIMUM	14 May 18	14 Apr 19	0.54 Apr 27, 1959
MAXIMUM PEAK FLOW		321 Sep 13	d2,640 Jun 20, 1953
MAXIMUM PEAK STAGE		2.51 Sep 13	8.50 Jun 20, 1953
ANNUAL RUNOFF (AC-FT)	83,120	a119,600	a93,460
10 PERCENT EXCEEDS	220	234	250
50 PERCENT EXCEEDS	102	66	109
90 PERCENT EXCEEDS	31	16	16

a Adjusted for storage at Williams Fork Reservoir. b Not adjusted for storage at Williams Fork Reservoir. c No flow for part of Apr 29, 1975. d Site and datum then in use, from rating curve extended above 1,500 ft3/s.