PLATTE RIVER BASIN

06620000 NORTH PLATTE RIVER NEAR NORTHGATE, CO

LOCATION.--Lat 40°56'15", long 106°20'16", in NE14 SW14 SE14 sec.11, T.11 N., R.80 W., Jackson County, Hydrologic Unit 10180001, on right bank 1,000 ft downstream from bridge on State Highway 125, 0.7 mi upstream from Camp Creek, 4.2 mi northwest of Northgate, and 4.4 mi south of Colorado-Wyoming State line.

DRAINAGE AREA.--1,431 mi2.

PERIOD OF RECORD.--May to November 1904 (published as "near Pinkhampton"), May 1915 to current year. Monthly discharge only for some periods, published in WSP 1310. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/wy/nwis/inventory/?site_no=06620000

REVISED RECORDS.--WSP 1310: 1916-21, 1929(M), 1930-32. WSP 1730: Drainage area.

GAGE.--Water-stage recorder. Elevation of gage is 7,810.39 ft above NGVD of 1929. See WSP 1730 for history of changes prior to April 8, 1918. April 8, 1918, to
August 21, 1961, water-stage recorder at site 0.7 mi downstream at datum 3.36 ft lower. August 22, 1961, to September 18, 1984, at site 650 ft upstream at same datum. U.S. Geological Survey data collection platform with satellite telemetry at station.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Diversions for irrigation of about 130,000 acres of hay meadows upstream from station. Transbasin diversions upstream from station to Cache la Poudre River basin.

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	34	e51	e101	e57	e63	e67	e306	426	2,590	526	245	97
2	36	e51	e101	e54	e63	e68	e397	370	3,130	475	210	98
3	44	e49	e100	e57	e61	e71	e456	301	3,300	435	188	92
4	64	e52	e98	e57	e60	e73	396	249	2,800	408	176	93
5	70	e55	e95	e56	e53	e72	350	239	2,340	360	180	95
6	59	e64	e93	e54	e48	e78	319	254	1,900	314	172	85
7	57	e74	e91	e54	e45	e79	274	247	1,770	301	146	96
8	53	e75	e87	e56	e48	e85	237	227	1,620	305	129	109
9	52	e70	e84	e51	e54	e91	241	227	1,360	281	128	107
10	50	e68	e84	e45	e60	e105	294	266	1,240	262	131	109
11	56	e65	e89	e44	e63	e105	393	302	1,570	297	114	105
12	53	e62	e86	e45	e67	e120	484	326	2,000	294	107	100
13	50	e71	e89	e46	e70	e141	510	291	2,150	293	113	92
14	49	e69	e91	e49	e70	e183	526	247	1,840	265	110	86
15	49	e66	e94	e49	e68	e205	590	229	1,570	255	99	81
16	48	e67	e89	e49	e67	e219	561	263	1,520	249	88	77
17	48	e77	e86	e47	e67	e212	487	332	1,480	266	103	72
18	47	e84	e85	e47	e66	e202	419	411	1,380	272	155	67
19	47	e87	e77	e52	e66	e198	360	548	1,350	343	188	66
20	45	e98	e68	e55	e67	e195	297	601	1,610	389	185	69
21	47	e101	e67	e53	e69	e205	261	526	1,640	359	131	70
22	47	e104	e64	e50	e67	e232	244	489	1,410	317	112	69
23	50	e106	e57	e51	e63	e290	291	498	1,180	281	107	66
24	53	e101	e57	e54	e61	e266	323	531	1,030	295	101	64
25	56	e98	e53	e53	e62	e275	338	667	1,030	280	117	62
26	57	e96	e52	e55	e64	e295	367	943	1,030	257	117	59
27	60	e90	e52	e60	e67	e280	410	1,120	873	252	117	52
28	61	e98	e54	e57	e66	e228	516	1,250	700	315	102	50
29	61	e102	e57	e55	---	e191	502	1,470	596	279	97	51
30	50	e101	e58	e56	---	e198	455	1,770	556	271	90	53
31	e49	---	e56	e60	---	e220	---	2,090	---	280	90	---
TOTAL	1,602	2,352	2,415	1,628	1,745	5,249	11,604	17,710	48,565	9,776	4,148	2,392
MEAN	51.7	78.4	77.9	52.5	62.3	169	387	571	1,619	315	134	79.7
MAX	70	106	101	60	70	295	590	2,090	3,300	526	245	109
MIN	34	49	52	44	45	67	237	227	556	249	88	50
AC-FT	3,180	4,670	4,790	3,230	3,460	10,410	23,020	35,130	96,330	19,390	8,230	4,740
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1904 - 2003, BY WATER YEAR (WY)
MEAN	159	151	104	83.5	88.9	176	743	1,121	1,459	627	261	147
MAX	538	366	215	177	199	722	2,444	3,649	3,296	2,367	763	712
(WY)	(1962)	(1962)	(1998)	(1984)	(1986)	(1986)	(1962)	(1984)	(1983)	(1957)	(1983)	(1997)
MIN	31.7	54.2	33.9	27.5	35.7	47.8	131	96.1	89.4	26.7	33.3	23.8
(WY)	(1935)	(1935)	(1977)	(1977)	(1933)	(1964)	(1981)	(2002)	(1934)	(1934)	(2002)	(1934)
SUMMARY STATISTICS				FOR 2002 CALENDAR YEAR			FOR 2003 CALENDAR YEAR			WATER YEARS 1904 - 2003
ANNUAL TOTAL				32,273			109,186			--
ANNUAL MEAN				88.4			299			428
HIGHEST ANNUAL MEAN				--			--			878 1917
LOWEST ANNUAL MEAN				--			--			91.5 2002
HIGHEST DAILY MEAN				e526 Apr 5			3,300 Jun 3			6,450 Jun 10, 1923
LOWEST DAILY MEAN				15 Sep 6,7			34 Oct 1			15 Sep 6,7 2002
ANNUAL SEVEN-DAY MINIMUM				16 Sep 2			47 Jan 10			16 Sep 2, 2002
MAXIMUM PEAK FLOW				--			3,410 Jun 3			a6,720 Jun 11, 1923
MAXIMUM PEAK STAGE				--			5.91 Jun 3			b9.65 Apr 25, 1980
ANNUAL RUNOFF (AC-FT)				64,010			216,600			310,000
10 PERCENT EXCEEDS				159			598			1,200
50 PERCENT EXCEEDS				72			100			160
90 PERCENT EXCEEDS				33			51			68
e Estimated.
a Gage height, 6.34 ft, site and datum then in use.
b Backwater from ice, site and datum then in use.