ARKANSAS RIVER BASIN

07134100 BIG SANDY CREEK NEAR LAMAR, CO

LOCATION.--Lat 38°06'51", long 102°29'00", in SW14SW14 sec.21, T.22 S., R.45 W., Prowers County, Hydrologic Unit 11020011, on right bank 35 ft upstream from State Highway 196, 950 ft upstream from mouth, and 7.5 mi east of Lamar.

DRAINAGE AREA.--3,248 mi2, of which about 585 mi2 is probably noncontributing.

PERIOD OF RECORD.-- February 1968 to September 1982, July 1995 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07134100

REVISED RECORDS.--WDR CO-01-1: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 3,545 ft above NGVD of 1929, from topographic map. Prior to June 30, 1977, at datum 1.00 ft higher.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow of stream affected by storage, erosion-control, and livestock-watering reservoirs, diversions for irrigation, ground-water withdrawals, and return flows from irrigated areas. Flow affected by backwater from the Arkansas River at times. 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.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of June 17, 1965, reached a discharge of 3,600 ft3/s, from slope-area measurement of peak flow
0.5 mi upstream from station. Flood of Aug. 21, 1965, reached a stage of 9.93 ft, from floodmarks, discharge unknown.

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	1.2	3.4	1.4	2.5	2.9	2.3	2.3	1.7	2.2	2.0	1.3	1.6
2	1.3	3.4	1.4	2.5	3.2	2.4	2.2	1.8	5.9	2.8	1.1	1.6
3	1.3	3.4	1.4	2.5	3.1	2.4	2.3	1.8	3.8	4.8	1.1	1.5
4	1.2	3.7	1.4	2.5	2.9	2.2	2.2	1.9	13	3.9	1.1	1.4
5	1.2	3.8	1.6	2.6	2.9	2.1	2.2	2.0	12	3.4	1.0	1.4
6	1.2	3.8	1.7	2.8	2.9	2.2	2.2	2.1	12	3.5	1.0	1.4
7	1.7	3.9	1.7	2.9	2.7	2.0	2.1	1.9	23	3.7	0.98	1.6
8	2.3	4.0	1.7	3.0	2.8	2.1	2.1	4.5	19	4.0	0.76	1.6
9	3.2	4.0	1.8	2.9	2.8	2.0	2.2	2.8	16	4.3	0.81	1.7
10	2.1	4.0	2.1	2.7	2.5	2.0	2.0	2.5	13	4.1	0.51	1.8
11	1.7	3.9	1.9	2.6	2.5	2.0	2.1	2.8	12	3.0	0.66	1.6
12	0.95	3.9	2.0	2.5	2.3	1.9	2.0	2.7	12	2.6	1.5	1.6
13	0.95	3.9	2.1	2.5	2.5	1.7	2.0	3.0	12	1.9	1.5	1.6
14	0.97	4.1	2.1	2.4	2.6	1.7	1.9	1.8	12	1.9	1.5	1.7
15	1.1	3.9	2.3	2.6	2.2	1.8	1.8	1.7	11	1.7	1.5	1.7
16	1.2	3.6	2.4	2.6	2.0	1.7	2.0	2.1	11	1.7	1.5	1.7
17	1.1	4.0	2.7	2.6	2.0	1.6	1.7	3.5	9.9	1.6	1.5	1.4
18	1.3	3.9	2.4	2.6	2.1	1.8	2.2	3.1	7.8	0.50	1.4	1.4
19	1.2	3.9	2.4	2.6	2.2	2.6	3.2	2.2	7.9	0.72	1.5	1.4
20	1.2	4.2	2.4	2.6	2.3	3.1	2.5	2.0	9.4	0.93	1.5	1.4
21	1.2	4.8	2.5	2.6	2.3	2.8	2.2	1.8	8.9	0.87	1.4	1.4
22	1.3	5.0	2.5	2.6	2.3	2.4	2.0	1.8	10	0.99	1.4	1.4
23	1.8	5.1	2.6	2.5	2.2	2.4	2.2	1.8	5.8	1.0	1.3	1.4
24	1.8	5.0	2.7	2.4	2.1	2.4	2.2	1.9	7.6	1.2	1.0	1.4
25	2.5	4.9	2.7	2.4	2.1	2.4	2.3	2.1	8.4	1.0	1.2	1.4
26	2.2	4.3	2.7	2.4	2.1	2.4	2.1	2.2	8.8	0.94	1.4	e1.2
27	2.7	1.9	2.9	2.6	2.2	2.3	2.0	2.1	8.6	1.2	0.68	e1.2
28	3.0	1.5	3.0	2.7	2.2	2.3	1.9	3.4	3.0	1.4	0.71	e1.0
29	3.2	1.6	3.0	3.1	---	2.1	1.9	1.8	2.7	1.2	2.4	e1.0
30	3.1	1.3	2.6	3.0	---	2.1	1.9	1.8	2.1	0.80	1.6	e0.90
31	3.3	---	2.4	2.7	---	2.1	---	2.3	---	1.2	1.6	---
TOTAL	54.47	112.1	68.5	81.5	68.9	67.3	63.9	70.9	290.8	64.85	38.41	43.40
MEAN	1.76	3.74	2.21	2.63	2.46	2.17	2.13	2.29	9.69	2.09	1.24	1.45
MAX	3.3	5.1	3.0	3.1	3.2	3.1	3.2	4.5	23	4.8	2.4	1.8
MIN	0.95	1.3	1.4	2.4	2.0	1.6	1.7	1.7	2.1	0.50	0.51	0.90
AC-FT	108	222	136	162	137	133	127	141	577	129	76	86
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1968 - 2003, BY WATER YEAR (WY)
MEAN	8.29	15.2	20.4	21.9	21.5	21.5	20.6	21.8	11.0	10.3	14.5	9.68
MAX	28.4	58.9	63.0	75.5	55.6	59.0	70.6	166	42.9	41.6	85.3	41.8
(WY)	(1997)	(1998)	(1998)	(1998)	(1998)	(1998)	(1999)	(1999)	(1999)	(1998)	(1997)	(1976)
MIN	0.087	0.41	0.34	0.50	2.23	2.10	0.81	2.14	1.77	0.21	0.027	0.084
(WY)	(1979)	(1978)	(1978)	(1978)	(1978)	(1977)	(1978)	(1975)	(1976)	(1978)	(1976)	(1978)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1968 - 2003
ANNUAL TOTAL	2,713.45	1,025.03
ANNUAL MEAN	7.43	2.81	16.6
HIGHEST ANNUAL MEAN			45.6 1999
LOWEST ANNUAL MEAN			2.23 1979
HIGHEST DAILY MEAN	e200 Aug 29	23 Jun 7	1,460 May 4, 1999
LOWEST DAILY MEAN	0.82 Sep 3	0.50 Jul 18	a0.00 Aug 13, 1976
ANNUAL SEVEN-DAY MINIMUM	1.1 Oct 12	0.82 Aug 5	0.00 Sep 1, 1976
MAXIMUM PEAK FLOW		71 Jun 4	b2,850 May 4, 1999
MAXIMUM PEAK STAGE		2.46 Jun 4	9.66 May 4, 1999
ANNUAL RUNOFF (AC-FT)	5,380	2,030	12,050
10 PERCENT EXCEEDS	18	4.1	42
50 PERCENT EXCEEDS	3.6	2.2	9.0
90 PERCENT EXCEEDS	1.3	1.2	0.95

e Estimated. a Also occurred on many days during 1976-79 water years. b From rating curve extended above 1,470 ft3/s on the basis of flow through culvert analysis with flow over road measurement at gage height 9.48 ft.