HYDROLOGIC-DATA STATION RECORDS

COLORADO RIVER MAIN STEM

09010500 COLORADO RIVER BELOW BAKER GULCH, NEAR GRAND LAKE, CO

LOCATION.--Lat 40°19'33", long 105°51'22", in NE14NW14 sec.12, T.4 N., R.76 W., Grand County, Hydrologic Unit 14010001, on left bank 500 ft downstream from Baker Gulch, 1.0 mi upstream from Bowen Gulch, and 5.5 mi northwest of town of Grand Lake.

DRAINAGE AREA.--53.4 mi2.

PERIOD OF RECORD.--May 1953 to current year. Daily record for water temperature available, October 1996 to September 1998. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09010500

REVISED RECORDS.--WSP 2124: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 8,750 ft above NGVD of 1929, from topographic map.

REMARKS.--Records poor. Transmountain diversion upstream from station by Grand River ditch (see elsewhere in this report). 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	13	e8.0	e4.5	e4.0	e3.4	e4.0	e4.5	e45	e778	371	40	33
2	14	e7.5	e4.5	e4.0	e3.6	e3.7	e4.8	e45	e623	350	31	28
3	16	e8.0	e4.5	e4.0	e3.8	e3.5	e5.0	e50	e567	349	31	28
4	17	e8.0	e4.5	e4.0	e3.8	e3.5	e5.0	e52	e551	333	43	27
5	17	e8.0	e4.5	e4.0	e3.8	e3.6	e5.0	e58	e478	314	33	24
6	16	e7.5	e4.5	e4.0	e3.8	e3.7	e5.2	e60	437	291	31	23
7	16	e7.0	e4.5	e4.0	e3.8	e4.0	e5.4	e60	397	253	30	25
8	16	e6.8	e4.5	e4.0	e3.8	e4.1	e6.0	e56	349	238	29	31
9	15	e6.5	e4.5	e3.8	e4.0	e3.7	e6.6	e58	368	238	30	30
10	15	e6.0	e4.5	e3.5	e4.0	e3.6	e6.8	e60	433	219	29	29
11	15	e6.0	e5.0	e3.5	e4.0	e3.5	e7.0	e60	465	202	27	31
12	14	e6.0	e5.2	e3.5	e4.0	e3.5	e8.0	e68	469	192	27	32
13	13	e6.0	e5.0	e3.5	e4.0	e3.7	e15	e70	458	185	33	31
14	13	e6.0	e4.8	e3.5	e3.5	e3.8	e25	e80	484	174	30	28
15	13	e6.0	e4.6	e3.5	e3.2	e3.8	e32	e90	508	169	24	26
16	13	e6.5	e4.4	e3.5	e3.0	e3.9	e33	e100	511	160	24	26
17	12	e6.5	e4.2	e3.5	e3.2	e3.9	e36	e110	486	180	68	26
18	13	e6.5	e4.0	e3.2	e3.5	e3.9	e40	e98	513	230	75	26
19	13	e6.5	e4.0	e3.2	e3.5	e4.0	e30	e100	518	202	51	28
20	12	e6.0	e4.0	e3.2	e3.5	e4.0	e28	e130	487	208	43	26
21	12	e5.0	e4.0	e3.2	e3.5	e4.1	e27	e180	468	192	37	24
22	e11	e5.0	e4.0	e3.2	e3.5	e4.1	e29	215	454	163	32	23
23	e10	e5.0	e4.0	e3.2	e3.5	e4.2	e32	249	452	151	34	22
24	e9.5	e5.0	e4.0	e3.2	e3.5	e4.2	e40	305	460	132	40	21
25	e9.0	e5.0	e4.0	e3.2	e3.5	e4.2	e42	e366	428	125	34	20
26	e8.0	e5.0	e4.0	e3.2	e3.8	e4.4	e50	e383	369	121	34	19
27	e7.5	e5.0	e4.0	e3.2	e4.0	e4.2	e40	e458	358	112	31	19
28	e7.0	e5.0	e4.0	e3.2	e4.2	e4.0	e40	e549	377	90	31	18
29	e7.0	e4.5	e4.0	e3.2	---	e3.8	e41	e633	384	52	28	18
30	e7.5	e4.5	e4.0	e3.2	---	e4.0	e43	e706	384	46	31	18
31	e8.0	---	e4.0	e3.2	---	e4.2	---	e800	---	42	40	---
TOTAL	382.5	184.3	134.2	108.6	102.7	120.8	692.3	6,294	14,014	6,084	1,101	760
MEAN	12.3	6.14	4.33	3.50	3.67	3.90	23.1	203	467	196	35.5	25.3
MAX	17	8.0	5.2	4.0	4.2	4.4	50	800	778	371	75	33
MIN	7.0	4.5	4.0	3.2	3.0	3.5	4.5	45	349	42	24	18
AC-FT	759	366	266	215	204	240	1,370	12,480	27,800	12,070	2,180	1,510
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1953 - 2003, BY WATER YEAR (WY)
MEAN	23.7	15.2	9.89	7.96	7.15	7.69	27.5	171	313	112	33.9	26.8
MAX	83.7	37.2	20.2	12.8	10.6	12.1	74.5	329	596	425	104	78.1
(WY)	(1962)	(1962)	(1998)	(1985)	(1984)	(1999)	(1962)	(1996)	(1997)	(1983)	(1983)	(1997)
MIN	9.25	6.14	4.33	3.50	3.67	3.90	9.11	65.7	69.8	24.4	11.1	11.8
(WY)	(1957)	(2003)	(2003)	(2003)	(2003)	(2003)	(1991)	(1995)	(1954)	(2002)	(1954)	(1956)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1953 - 2003
ANNUAL TOTAL	9,106.7	29,978.4
ANNUAL MEAN	24.9	82.1	63.3
HIGHEST ANNUAL MEAN			109 1983
LOWEST ANNUAL MEAN			26.3 1954
HIGHEST DAILY MEAN	191 Jun 2	e800 May 31	916 Jun 30, 1957
LOWEST DAILY MEAN	e4.0 Dec 18	e3.0 Feb 16	a3.0 Jan 13, 1963
ANNUAL SEVEN-DAY MINIMUM	e4.0 Dec 18	e3.2 Jan 18	3.2 Jan 18, 2003
MAXIMUM PEAK FLOW		Not determined	976 Jun 30, 1957
MAXIMUM PEAK STAGE		7.44 Jun 1	b7.19 Jun 30, 1957
ANNUAL RUNOFF (AC-FT)	18,060	59,460	45,870
10 PERCENT EXCEEDS	64	361	190
50 PERCENT EXCEEDS	12	13	18
90 PERCENT EXCEEDS	5.0	3.5	6.5

e Estimated. a Also occurred Feb. 16, 2003. b Maximum gage height, 7.44 ft, Jun 1, 2003, backwater from debris.