PLATTE RIVER BASIN

06752260 CACHE LA POUDRE RIVER AT FORT COLLINS, CO

LOCATION.--Lat 40°35'21", long 105°04'09", in SE14NW14 sec.12, T.7 N., R.69 W., Larimer County, Hydrologic Unit 10190007, on left bank 100 ft upstream from Lincoln Street Bridge in Fort Collins.

DRAINAGE AREA.--1,127 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--April 1975 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06752260

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 4,940 ft above NGVD of 1929, from topographic map. Prior to May 22, 1987, at site 300 ft downstream, at different datum. May 22, 1987 to Nov. 10, 1988 at site 4,300 ft upstream, at different datum. Nov. 10, 1988 to Oct. 16, 1996, at site 100 ft upstream, at same datum.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow of stream affected by transmountain and transbasin diversions, storage reservoirs, power developments, diversion for municipal supply, diversions upstream from station for irrigation, and return flow from irrigated areas.

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	6.3	4.6	9.9	11	11	e5.0	6.2	52	1,310	352	49	73
2	8.3	2.3	18	10	11	3.2	7.1	66	1,050	296	60	29
3	9.4	2.3	17	10	13	2.5	6.0	14	851	286	56	20
4	6.9	2.4	14	10	e11	2.4	6.0	7.5	683	237	91	23
5	7.8	3.3	15	9.3	e9.0	2.3	5.8	4.8	484	147	71	21
6	6.3	2.1	18	9.5	e8.6	2.3	8.3	3.2	263	26	39	21
7	7.5	2.3	16	9.4	8.4	2.3	4.7	2.3	356	16	37	20
8	3.9	3.3	15	11	6.8	2.2	2.3	2.0	329	23	30	28
9	2.2	2.1	12	11	4.7	2.0	1.1	6.2	266	23	65	31
10	2.4	1.8	12	14	4.0	1.6	1.0	114	285	41	73	26
11	2.0	2.1	12	22	5.0	e1.0	1.2	155	550	70	27	20
12	1.5	0.59	11	16	8.1	e1.0	1.9	141	413	72	28	63
13	2.0	0.72	12	12	8.9	e1.0	2.6	171	70	76	23	39
14	2.5	0.87	12	13	9.2	e1.0	2.4	163	76	75	22	61
15	2.0	0.75	13	11	9.7	e1.0	5.1	55	148	33	36	56
16	2.0	0.91	12	9.8	9.6	e1.0	3.9	112	176	51	48	44
17	2.4	1.4	15	11	8.7	e6.0	79	133	247	105	54	34
18	2.2	1.6	12	11	8.2	6.9	148	114	288	119	60	35
19	2.4	1.9	11	10	8.2	19	108	177	397	108	53	25
20	5.3	2.0	16	10	8.0	4.3	105	154	334	136	29	20
21	4.2	2.0	12	10	7.9	9.9	107	214	286	31	20	15
22	7.4	3.0	13	9.5	7.8	8.1	103	221	211	91	53	13
23	4.3	2.4	10	18	7.2	8.1	74	277	223	78	63	12
24	3.8	2.5	11	9.8	7.1	9.0	36	399	314	67	62	10
25	3.6	2.6	15	9.6	e6.0	7.6	18	386	347	60	27	10
26	5.3	2.5	14	9.4	e5.5	11	15	609	260	101	29	8.7
27	2.9	2.4	12	9.3	e5.5	15	14	535	221	153	28	7.8
28	2.3	2.4	8.5	9.6	e5.3	8.8	14	668	314	65	35	7.4
29	2.8	2.3	8.9	9.0	---	6.2	9.2	689	431	24	69	7.4
30	3.4	2.3	12	10	---	5.3	9.9	1,160	376	41	107	7.2
31	3.7	---	12	9.2	---	5.3	---	1,120	---	62	100	---
TOTAL	129.0	63.74	401.3	344.4	223.4	162.3	905.7	7,925.0	11,559	3,065	1,544	787.5
MEAN	4.16	2.12	12.9	11.1	7.98	5.24	30.2	256	385	98.9	49.8	26.2
MAX	9.4	4.6	18	22	13	19	148	1,160	1,310	352	107	73
MIN	1.5	0.59	8.5	9.0	4.0	1.0	1.0	2.0	70	16	20	7.2
AC-FT	256	126	796	683	443	322	1,800	15,720	22,930	6,080	3,060	1,560
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1975 - 2003, BY WATER YEAR (WY)
MEAN	25.7	28.6	24.8	31.0	32.5	32.9	99.3	437	872	228	72.1	34.7
MAX	182	183	97.3	123	135	136	652	2,720	4,771	1,450	301	207
(WY)	(1998)	(1998)	(1985)	(1984)	(1984)	(1980)	(1983)	(1980)	(1983)	(1983)	(1997)	(1997)
MIN	1.76	1.79	1.91	2.29	1.30	1.91	0.37	14.9	158	34.9	12.8	4.79
(WY)	(2002)	(1978)	(1978)	(1978)	(1987)	(1988)	(1988)	(1976)	(1989)	(2002)	(1988)	(1987)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1975 - 2003
ANNUAL TOTAL	12,192.94	27,110.34
ANNUAL MEAN	33.4	74.3	162
HIGHEST ANNUAL MEAN			779 1983
LOWEST ANNUAL MEAN			33.3 2002
HIGHEST DAILY MEAN	416 Jun 3	1,310 Jun 1	6,080 Jun 21, 1983
LOWEST DAILY MEAN	0.59 Nov 12	0.59 Nov 12	a0.00 Aug 18, 1987
ANNUAL SEVEN-DAY MINIMUM	0.98 Nov 12	0.98 Nov 12	0.00 Mar 24, 1988
MAXIMUM PEAK FLOW		2,100 May 30	7,710 Apr 30, 1999
MAXIMUM PEAK STAGE		6.42 May 30	10.46 Apr 30, 1999
ANNUAL RUNOFF (AC-FT)	24,180	53,770	117,000
10 PERCENT EXCEEDS	74	229	329
50 PERCENT EXCEEDS	14	12	25
90 PERCENT EXCEEDS	1.9	2.3	2.8

e Estimated. a Also occurred Aug 19, Sep 4, 18-19, 1987, and many days in 1988.