ARKANSAS RIVER BASIN

07130000 JOHN MARTIN RESERVOIR AT CADDOA, CO

LOCATION.--Lat 38°04'05", long 102°56'13", in NE14NW14 sec.8, T.23 S., R.49 W., Bent County, Hydrologic Unit 11020009, in north parapet of dam on Arkansas River at Caddoa, 3.2 mi southeast of Hasty, and 58 mi upstream from Colorado-Kansas State Line.

DRAINAGE AREA.--18,915 mi2, of which 785 mi2 is probably noncontributing.

PERIOD OF RECORD.--December 1942 to current year. Month-end contents only prior to November 1943, published in WSP 1311. Water-quality data available, June to October 1988 (profile and chemical data at transects along length of reservoir). For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07130000

GAGE.--Water-stage recorder with satellite telemetry for elevations above 3,784 ft (48 acre-feet) and nonrecording gage read once daily for those below. Datum of gage is 3,760.00 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers); gage readings have been reduced to elevations above NGVD of 1929.

REMARKS.--Reservoir is formed by concrete and earthfill dam. Construction started fall of 1939; storage began while dam was under construction in Jan. 1943; record of contents began Dec. 31, 1942; dam completed October 1948. All figures represent total contents from area-capacity table effective Nov. 1, 1999, and based on a 1999 resurvey by the U.S. Army Corp of Engineers. Total capacity at top of dam, 793,400 acre-ft at elevation 3,880.00 ft. Maximum flood control storage at top of spillway gates, 603,500 acre-ft at elevation 3,870.00 ft. Maximum recreation and conservation storage, 344,000 acre-ft at elevation 3,851.87 ft. Capacity at spillway crest, 222,400 acre-ft at elevation 3,840.00 ft. Elevation of no contents, 3,780.00 ft. No dead storage. Reservoir is used for flood control, storage for irrigation, recreation, and in the administration of terms of the Arkansas River Compact between the states of Colorado and Kansas.

COOPERATION.--Capacity tables provided by U.S. Army Corps of Engineers. Records prior to 1979 were furnished by the U.S. Army Corps of Engineers.

EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 451,000 acre-ft, May 10, 1999, elevation, 3,860.57 ft; no contents at times many years.

EXTREMES FOR CURRENT YEAR.--Maximum contents, 45,400 acre-ft, Apr. 16, elevation, 3,809.78 ft; minimum contents, 20,300 acre-ft, Sept. 30, elevation, 3,801.10 ft.

Reservoir capacity table

(elevation, in feet, and contents, in acre-feet, effective Nov. 1, 1999)

Elevation	Contents	Elevation	Contents
3,785.0	235	3,820.0	86,400
3,790.0	2,410	3,830.0	144,000
3,795.0	8,300	3,840.0	222,000
3,800.0	17,800	3,850.0	323,000
3,810.0	46,200	3,860.0	448,000

Reservoir storage, acre feet 

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

DAILY OBSERVATION AT 2400 HOURS

DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP
1	22,200	21,500	23,800	29,000	34,600	39,000	43,700	40,800	29,600	28,300	24,500	22,000
2	22,200	21,600	23,900	29,300	34,600	39,200	43,800	40,600	29,000	28,000	24,400	22,000
3	22,200	21,600	24,100	29,500	34,900	39,400	43,900	40,600	28,400	27,900	24,400	22,100
4	22,200	21,700	24,300	29,700	35,100	39,500	43,900	40,200	27,800	27,900	24,300	22,000
5	22,200	21,700	24,600	29,900	35,200	39,700	44,100	39,900	28,000	27,600	24,100	21,900
6	22,100	21,700	24,700	30,200	35,400	39,900	44,300	39,100	28,300	27,500	24,100	21,900
7	22,100	21,800	24,900	30,300	35,500	39,900	44,500	38,600	28,800	27,300	23,900	22,100
8	22,100	21,900	25,100	30,500	35,600	39,900	44,600	38,100	28,800	27,200	23,800	22,000
9	22,000	21,900	25,200	30,700	35,800	40,200	44,800	37,300	28,600	27,000	23,700	22,200
10	22,000	21,900	25,400	30,800	e35,900	40,300	44,900	36,800	28,500	26,900	23,700	22,100
11	22,000	21,900	25,600	30,900	36,000	40,500	44,900	36,200	28,600	26,700	23,800	22,000
12	21,900	22,000	25,700	31,200	36,200	40,700	44,900	35,700	28,900	26,700	23,800	21,900
13	21,900	22,000	25,900	31,300	36,400	40,800	44,900	35,100	29,500	26,600	23,600	21,900
14	21,800	22,000	26,100	31,500	36,600	41,000	44,900	34,600	29,900	26,600	23,400	21,800
15	21,800	22,100	26,300	31,700	36,700	41,100	45,100	34,100	30,300	26,400	23,200	21,900
16	21,800	22,100	26,400	e31,900	36,900	41,200	44,000	33,600	30,300	26,200	23,100	21,800
17	21,700	22,300	26,600	32,000	37,100	41,400	43,700	33,500	29,900	26,100	23,100	21,900
18	21,700	22,200	26,800	32,200	37,300	41,500	43,400	33,500	29,300	26,000	22,800	21,700
19	21,700	22,300	26,900	32,300	37,500	41,800	43,300	33,400	29,000	25,900	22,800	21,600
20	21,700	22,400	27,100	32,400	37,700	41,800	43,000	33,100	28,600	25,900	22,800	21,700
21	e21,700	22,500	27,200	32,600	37,900	42,000	42,600	33,100	28,600	25,800	22,800	21,700
22	21,600	22,700	27,300	32,700	37,900	42,100	42,300	33,200	28,700	25,500	22,600	21,600
23	21,700	22,600	27,500	32,800	38,100	42,100	42,300	33,200	28,400	25,500	22,400	21,500
24	e21,700	22,900	27,600	32,900	38,100	42,200	41,700	33,100	28,200	25,300	22,300	21,400
25	21,700	23,000	27,600	33,100	38,200	42,300	41,800	33,800	27,900	25,200	22,300	21,200
26	21,700	23,100	27,700	e33,300	38,400	42,400	41,900	33,900	27,800	25,000	22,200	21,000
27	21,800	23,200	27,800	e33,500	38,500	42,600	41,800	33,500	28,000	24,900	22,200	20,900
28	21,700	23,400	27,900	e33,700	38,800	42,900	41,500	32,700	28,300	24,900	22,100	20,700
29	21,700	23,500	28,100	e33,900	---	43,200	41,300	31,800	28,200	24,800	22,000	20,500
30	21,500	23,700	28,300	34,100	---	43,400	41,100	30,800	28,500	24,700	22,100	20,400
31	21,400	---	28,600	34,400	---	e43,500	---	30,100	---	24,700	22,000	---
MAX	22,200	23,700	28,600	34,400	38,800	43,500	45,100	40,800	30,300	28,300	24,500	22,200
MIN	21,400	21,500	23,800	29,000	34,600	39,000	41,100	30,100	27,800	24,700	22,000	20,400

e Estimated.