PLATTE RIVER BASIN

06741510 BIG THOMPSON RIVER AT LOVELAND, CO

LOCATION.--Lat 40°22'43", long 105°03'38", in SE14SE14 sec.24, T.5 N., R.69 W., Larimer County, Hydrologic Unit 10190006, on right bank 690 ft downstream from county road bridge C-13, 1.7 mi south of sugar refinery in Loveland, and 1.9 mi downstream from Farmers Ditch diversion.

DRAINAGE AREA.--535 mi2.

PERIOD OF RECORD.--July 1979 to current year. For a complete listing of historical data available for this site see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06741510

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 4,906 ft above NGVD of 1929, from topographic map.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow of stream affected by transmountain diversions, storage reservoirs, power developments, diversions for irrigation, and return flow from irrigated areas. Water-quality data for this site is included in the "Big Thompson Project" 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	30	6.1	4.2	3.3	e3.2	2.5	4.2	4.4	128	101	68	47
2	37	10	4.0	3.3	e3.1	2.6	2.4	4.3	105	96	99	36
3	34	8.5	3.9	3.3	e3.1	2.5	4.7	4.3	129	95	93	33
4	32	7.6	3.9	3.3	e3.1	2.6	4.6	4.1	127	85	77	36
5	29	4.7	3.9	3.3	e3.1	2.7	4.9	4.1	111	81	67	35
6	21	4.1	3.7	3.3	e2.9	2.5	11	3.9	80	91	68	29
7	20	3.1	3.6	3.3	e2.6	2.5	7.3	4.1	87	84	65	21
8	16	3.1	3.6	3.3	e2.3	2.5	5.0	4.4	76	73	70	26
9	18	5.7	3.6	3.3	e2.2	2.5	4.6	6.4	75	54	72	21
10	18	9.4	3.6	3.3	e2.4	2.6	3.4	35	77	50	71	18
11	17	9.7	3.5	3.3	2.5	2.4	3.6	9.5	74	56	61	19
12	21	4.3	3.3	3.3	2.5	2.4	3.7	9.8	79	60	68	15
13	20	3.6	3.5	3.2	2.5	2.5	4.3	12	79	64	67	15
14	24	5.2	3.4	3.3	2.5	2.7	4.3	12	88	78	69	13
15	19	4.3	3.3	3.2	2.7	2.8	5.5	12	76	73	69	6.5
16	16	3.9	3.2	3.2	2.5	2.8	5.9	11	81	75	57	50
17	10	3.9	3.3	3.2	2.5	5.1	3.9	5.8	131	73	50	112
18	9.6	3.8	3.6	3.2	2.5	16	4.2	4.9	326	75	52	72
19	5.5	3.6	3.4	3.2	2.5	12	3.9	4.6	180	67	51	20
20	4.5	4.0	3.3	3.2	2.5	10	3.9	0.93	82	70	68	29
21	3.6	4.3	3.3	3.0	2.5	9.2	3.8	0.48	81	70	55	26
22	1.3	4.2	3.3	3.0	2.5	7.4	4.9	4.6	77	64	45	4.5
23	1.6	4.2	3.3	3.3	2.5	6.1	14	4.7	80	67	39	10
24	1.9	4.8	3.3	3.3	2.7	7.8	19	3.9	99	66	38	8.1
25	2.0	4.8	3.3	3.3	2.6	5.8	8.3	8.0	88	55	43	9.9
26	2.0	4.3	3.4	3.3	2.5	5.1	5.9	17	82	60	42	12
27	1.1	3.9	3.2	3.3	2.5	5.6	4.9	29	83	94	42	18
28	1.5	3.9	3.3	3.3	2.5	5.2	4.2	56	83	99	37	18
29	2.4	3.9	3.3	3.3	---	5.1	4.3	63	104	130	58	10
30	1.5	3.9	3.3	e3.3	---	5.0	4.7	100	108	86	101	11
31	2.4	---	3.3	e3.3	---	e4.8	---	131	---	34	61	---
TOTAL	422.9	150.8	108.1	101.0	73.5	151.3	169.3	575.21	3,076	2,326	1,923	781.0
MEAN	13.6	5.03	3.49	3.26	2.62	4.88	5.64	18.6	103	75.0	62.0	26.0
MAX	37	10	4.2	3.3	3.2	16	19	131	326	130	101	112
MIN	1.1	3.1	3.2	3.0	2.2	2.4	2.4	0.48	74	34	37	4.5
AC-FT	839	299	214	200	146	300	336	1,140	6,100	4,610	3,810	1,550
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1979 - 2003, BY WATER YEAR (WY)
MEAN	30.1	20.5	12.7	16.6	16.3	12.7	42.1	212	280	114	74.9	36.9
MAX	111	95.8	51.9	95.5	129	61.4	292	2,078	1,493	418	153	83.9
(WY)	(1998)	(1985)	(1998)	(1998)	(1998)	(1998)	(1980)	(1980)	(1983)	(1995)	(1981)	(1982)
MIN	6.15	3.10	2.86	2.55	2.42	2.19	3.49	4.07	25.0	29.9	29.0	16.6
(WY)	(1988)	(2001)	(1993)	(1994)	(1993)	(1996)	(2001)	(1981)	(1982)	(1987)	(1997)	(1990)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1979 - 2003
ANNUAL TOTAL	12,191.8	9,858.11
ANNUAL MEAN	33.4	27.0	72.5
HIGHEST ANNUAL MEAN			321 1980
LOWEST ANNUAL MEAN			27.0 2003
HIGHEST DAILY MEAN	122 May 24	326 Jun 18	4,240 May 1, 1980
LOWEST DAILY MEAN	1.1 Oct 27	0.48 May 21	0.48 May 21, 2003
ANNUAL SEVEN-DAY MINIMUM	1.6 Oct 22	1.6 Oct 22	0.89 May 10, 1981
MAXIMUM PEAK FLOW		679 Jun 18	6,970 Apr 30, 1980
MAXIMUM PEAK STAGE		3.92 Jun 18	a,b10.10 Apr 30, 1980
ANNUAL RUNOFF (AC-FT)	24,180	19,550	52,550
10 PERCENT EXCEEDS	78	81	125
50 PERCENT EXCEEDS	16	5.1	18
90 PERCENT EXCEEDS	3.6	2.5	3.3

e Estimated. a From high-water mark. b Maximum gage height, 10.48 ft, Apr 30, 1999.