PLATTE RIVER BASIN

06764000 SOUTH PLATTE RIVER AT JULESBURG, CO

LOCATION.--Lat 40°58'46", long 102°15'15", in NW14NE14 and NE14SE14 (three channels) sec.33, T.12 N., R.44 W., Sedgwick County, Hydrologic Unit 10190018, on left bank of channel no. 4 (left channel) 215 ft downstream from bridge, on right bank of channel no. 2, 5 ft downstream from bridge on U.S. Highway 385, and on left bank of channel no. 1, 5 ft upstream from bridge on U.S. Highway 385, 0.9 mi southeast of Julesburg, 3.0 mi upstream from Colorado-Nebraska State line, and 8 mi downstream from Lodgepole Creek.

DRAINAGE AREA.--22,821 mi2 (revised).

PERIOD OF RECORD.--April 1902 to current year. Monthly discharge only for some periods, published in WSP 1310. Published as "near Julesburg" 1903-8, 1915-16, and as "at Ovid" 1922-24. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06764000

REVISED RECORDS.--WSP 1310: 1902, 1906-7, 1948(P). WSP 1440: 1903-4. WDR CO-86-1: Drainage area.

GAGE.--Three water-stage recorders with satellite telemetry. Datum of channel no. 4 gage is 3,446.76 ft above NGVD of 1929. See WSP 1710 or 1730 for history of changes prior to Oct. 1, 1956. Since Oct. 1, 1956, water-stage recorders on channels nos. 2 and 4. Channel no. 2: Oct. 1, 1956 to Sept. 22, 1965, at site 300 ft downstream at present datum. Channel no. 4: Oct. 1, 1956 to Dec. 10, 1958, at site 135 ft downstream at present datum. Since May 11, 1973, supplementary water-stage recorder on channel no. 2 at bridge 800 ft upstream at same datum. Since Aug. 16, 1996, water-stage recorder on channel no. 1; satellite telemetry installed Oct. 24, 1996.

REMARKS.--Records good except for periods Nov. 26 to Mar. 10, and July 15 to Aug. 12, which are fair, and estimated daily discharges, which are poor. Natural flow of stream affected by transmountain diversions, storage reservoirs, power developments, ground-water withdrawals and diversions for irrigation of about 1,200,000 acres upstream from station, and return flow from irrigated areas.

COOPERATION.--Records collected and computed by Colorado Division of Water Resources and reviewed by Geological Survey.

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	21	16	14	21	64	e84	44	138	31	27	20	17
2	27	20	14	27	57	e112	55	152	33	25	24	18
3	24	17	14	36	53	116	61	157	32	25	24	16
4	28	16	14	54	51	104	71	149	33	24	24	e17
5	31	16	14	33	50	86	84	140	32	25	24	15
6	29	16	17	35	47	81	110	134	34	21	26	15
7	26	e16	15	27	44	72	138	127	47	26	26	17
8	26	e16	13	27	46	42	149	141	61	38	26	19
9	26	e16	15	25	47	34	116	146	104	26	25	35
10	27	e15	17	27	44	32	150	147	103	21	23	34
11	27	e16	20	e29	44	30	141	120	108	e20	22	38
12	26	e16	16	e37	44	29	137	114	132	e20	21	42
13	26	16	17	38	44	26	114	84	107	e18	20	44
14	26	16	17	39	44	25	93	78	98	e18	19	51
15	26	16	17	44	43	24	89	69	78	17	18	56
16	29	15	19	e38	42	24	98	69	61	16	18	62
17	19	15	21	e39	43	25	94	69	55	16	18	68
18	18	14	20	e40	44	30	96	67	56	15	e18	79
19	17	15	19	51	49	33	94	67	56	16	19	93
20	16	14	21	56	46	29	92	65	50	17	19	101
21	17	14	20	66	43	27	89	57	42	16	16	107
22	16	14	22	e63	46	27	90	47	38	15	15	108
23	17	15	e29	e64	e39	28	92	43	38	15	15	107
24	16	15	e38	e65	e60	29	101	40	38	21	14	105
25	19	15	e38	e65	e59	29	103	36	36	22	14	111
26	18	15	e49	67	61	27	124	37	34	19	12	116
27	20	15	e48	87	63	27	139	34	31	24	12	114
28	16	14	e48	96	67	26	115	33	31	30	e16	103
29	26	14	e37	91	---	49	104	31	34	25	15	95
30	20	14	35	76	---	44	115	32	30	22	14	91
31	16	---	26	75	---	40	---	30	---	20	14	---
TOTAL	696	462	724	1,538	1,384	1,391	3,098	2,653	1,663	660	591	1,894
MEAN	22.5	15.4	23.4	49.6	49.4	44.9	103	85.6	55.4	21.3	19.1	63.1
MAX	31	20	49	96	67	116	150	157	132	38	26	116
MIN	16	14	13	21	39	24	44	30	30	15	12	15
AC-FT	1,380	916	1,440	3,050	2,750	2,760	6,140	5,260	3,300	1,310	1,170	3,760
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1902 - 2003, BY WATER YEAR (WY)
MEAN	313	353	415	530	610	550	545	1,054	1,474	303	186	247
MAX	2,427	2,358	1,371	1,571	1,864	2,200	2,808	9,922	12,200	5,059	1,882	1,964
(WY)	(1985)	(1985)	(1985)	(1998)	(1930)	(1939)	(1983)	(1980)	(1983)	(1983)	(1997)	(1984)
MIN	5.85	15.4	18.8	49.6	49.4	44.9	17.3	24.1	8.33	2.15	2.52	5.60
(WY)	(1904)	(2003)	(1912)	(2003)	(2003)	(2003)	(1904)	(1911)	(1910)	(1903)	(1902)	(1903)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1902 - 2003
ANNUAL TOTAL	33,705	16,754
ANNUAL MEAN	92.3	45.9	551
HIGHEST ANNUAL MEAN			2,882 1983
LOWEST ANNUAL MEAN			45.9 2003
HIGHEST DAILY MEAN	550 Feb 5	157 May 3	30,800 Jun 16, 1921
LOWEST DAILY MEAN	13 Dec 8	12 Aug 26	a0.00 Aug 18, 1902
ANNUAL SEVEN-DAY MINIMUM	14 Nov 28	14 Aug 24	0.00 Jul 25, 1903
MAXIMUM PEAK FLOW		174 May 2	37,600 Jun 20, 1965
MAXIMUM PEAK STAGE		b3.46 May 2	c10.44 Jun 20, 1965
ANNUAL RUNOFF (AC-FT)	66,850	33,230	399,500
10 PERCENT EXCEEDS	279	104	1,170
50 PERCENT EXCEEDS	26	31	227
90 PERCENT EXCEEDS	16	15	28

e Estimated. a Also occurred Aug 19-20, 1902, and Jul 25 to Aug 7, 1903. b Gage height recorded for channel #1. c From floodmarks in gage well.