PLATTE RIVER BASIN

06751150 NORTH FORK CACHE LA POUDRE RIVER BELOW HALLIGAN RESERVOIR NEAR VIRGINIA DALE, CO

LOCATION.--Lat 40°52'42", long 105°20'15", in NE14SW14 sec.34, T.11 N., R.71 W., Larimer County, Hydrologic Unit 10190007, on left bank 500 ft downstream from Halligan Dam, 4.0 mi west of Highway 287, and 5.0 mi south of Virginia Dale.

DRAINAGE AREA.--355 mi2.

PERIOD OF RECORD.--March 1998 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06751150

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 6,310 ft above NGVD of 1929, from topographic map.

REMARKS.--Records fair except for estimated daily discharges, which are poor. Natural flow affected by transbasin diversions, storage reservoirs, and irrigation. 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	9.3	1.7	3.7	1.5	2.1	2.2	1.5	261	534	103	107	96
2	5.6	1.5	3.7	4.5	1.9	2.2	1.5	239	502	92	106	56
3	4.7	1.4	3.7	5.5	2.4	2.2	1.5	220	470	81	106	54
4	4.7	1.4	3.7	4.7	2.4	3.0	1.2	211	455	73	105	65
5	4.7	1.4	3.7	4.7	2.4	3.5	1.1	207	455	67	104	68
6	4.7	1.9	3.7	4.6	2.4	3.3	1.1	195	410	70	107	67
7	4.9	2.5	3.6	4.5	2.4	3.1	1.2	187	401	75	108	66
8	4.9	2.7	3.5	4.1	2.4	3.2	1.1	186	381	68	107	66
9	4.9	2.7	2.9	3.8	2.4	3.2	1.1	188	318	62	106	66
10	4.6	2.7	2.4	3.3	2.4	3.7	1.1	215	299	66	106	66
11	4.5	2.7	2.4	2.7	2.4	3.5	1.2	210	299	73	105	58
12	4.7	2.7	2.7	2.8	2.3	1.6	1.2	254	307	78	104	48
13	4.7	2.7	2.7	2.8	2.2	0.15	36	298	292	81	103	47
14	4.7	2.8	2.3	2.5	2.3	2.2	79	299	285	81	103	47
15	4.7	e2.8	1.8	2.5	2.5	3.7	80	319	261	90	102	47
16	4.7	e3.2	1.6	2.3	2.5	3.7	101	358	242	96	102	46
17	4.9	e3.2	1.4	2.1	2.5	2.9	124	401	232	99	102	35
18	4.9	3.2	3.3	2.1	2.3	2.4	133	425	218	99	103	28
19	4.8	3.2	4.1	2.0	2.5	2.4	137	422	207	98	102	28
20	4.7	3.1	3.5	2.2	2.6	1.9	137	390	203	96	102	28
21	4.6	3.1	2.9	2.4	2.7	1.9	141	371	201	96	102	28
22	4.5	3.2	2.7	2.4	2.7	2.0	143	362	185	95	100	28
23	4.5	3.2	2.6	2.4	2.7	2.0	142	366	173	94	99	28
24	4.5	3.5	2.2	2.2	2.7	2.0	143	380	164	94	105	28
25	4.4	3.4	1.9	1.8	2.6	2.0	143	387	127	94	106	28
26	3.9	3.5	2.1	1.8	2.5	2.0	146	386	138	93	107	28
27	3.8	3.6	2.3	1.3	2.5	1.7	232	378	140	93	106	28
28	4.4	3.7	2.4	1.9	2.4	1.6	272	401	123	107	106	28
29	4.5	3.7	2.4	1.9	---	1.6	282	472	116	110	105	28
30	3.8	3.7	2.2	1.9	---	1.6	280	537	112	110	104	28
31	2.6	---	1.8	2.3	---	1.6	---	566	---	108	103	---
TOTAL	145.8	84.1	85.9	87.5	68.1	74.05	2,765.8	10,091	8,250	2,742	3,233	1,362
MEAN	4.70	2.80	2.77	2.82	2.43	2.39	92.2	326	275	88.5	104	45.4
MAX	9.3	3.7	4.1	5.5	2.7	3.7	282	566	534	110	108	96
MIN	2.6	1.4	1.4	1.3	1.9	0.15	1.1	186	112	62	99	28
AC-FT	289	167	170	174	135	147	5,490	20,020	16,360	5,440	6,410	2,700
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2003, BY WATER YEAR (WY)
MEAN	7.83	3.89	7.43	16.1	26.3	48.1	72.4	264	181	84.7	77.1	52.4
MAX	22.1	5.71	17.9	37.2	46.3	80.7	131	641	369	129	120	105
(WY)	(2000)	(2000)	(1999)	(2000)	(1999)	(1999)	(1998)	(1999)	(1999)	(1999)	(1999)	(1999)
MIN	3.69	2.80	2.77	2.82	2.43	2.39	2.67	35.9	45.3	34.5	21.2	14.6
(WY)	(1999)	(2003)	(2003)	(2003)	(2003)	(2003)	(2002)	(2002)	(2002)	(2002)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1998 - 2003
ANNUAL TOTAL	6,756.5	28,989.25
ANNUAL MEAN	18.5	79.4	67.9
HIGHEST ANNUAL MEAN			135 1999
LOWEST ANNUAL MEAN			18.6 2002
HIGHEST DAILY MEAN	99 Sep 1	566 May 31	1,500 May 1, 1999
LOWEST DAILY MEAN	1.2 Apr 16	0.15 Mar 13	0.15 Mar 13, 2003
ANNUAL SEVEN-DAY MINIMUM	1.3 Apr 10	1.1 Apr 4	1.1 Apr 4, 2003
MAXIMUM PEAK FLOW		592 May 31	1,840 Apr 30, 1999
MAXIMUM PEAK STAGE		4.66 May 31	6.47 Apr 30, 1999
ANNUAL RUNOFF (AC-FT)	13,400	57,500	49,190
10 PERCENT EXCEEDS	73	265	139
50 PERCENT EXCEEDS	3.7	4.7	34
90 PERCENT EXCEEDS	2.3	1.9	2.8

e Estimated.