USGS Water-Year Summary for Site 07130000

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	Available Parameters
	00054 Reservoir storage(Obs.)
	62614 Elevation, lake/res, NGVD29(Obs.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

07130000 JOHN MARTIN RESERVOIR AT CADDOA, CO

LOCATION - Lat 38°04'05", long 102°56'13" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.08, T.23 S., R.49 W., Bent County, CO, 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 probably is noncontributing.

SURFACE-WATER RECORDS

PERIOD OF RECORD - December 1942 to current year. Storage record is discontinued November 2020, and only Elevation will now be reported. Month-end contents only prior to November 1943, published in WSP 1311.

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.

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.

REMARKS - Water year 2014; no estimated daily storage or elevations. Water year 2015; no estimated daily storage or elevations. Water year 2016; no estimated daily storage or elevations. Water year 2017; estimated daily storage for the periods Nov. 8-9 and Mar. 6. Water year 2018; no estimated daily storage or elevations. Water year 2019; estimated daily storage for the periods Mar. 13 and Sept. 6-9. Water year 2020; estimated daily storage for the periods Nov. 10-11, Jan. 22-23, Feb. 5-10, Mar. 19, June 26, Aug. 4-5, Aug. 20-21, Sept. 7-8, and Sept. 26-27. Water year 2021; storage record is discontinued November 2020, and only Elevation will now be reported. Estimated daily elevation for the periods Oct. 24, Apr. 6, Apr. 27, May 15-16, May 21-22, May 29, June 1, June 19-20, June 23-24, June 26, July 3, July 9, Aug. 23, Aug. 25-26, Sept. 1-3, Sept. 12-13, and Sept. 9. Water year 2022; estimated days are less accurate than the rest of the published record. Water year 2023; estimated days are less accurate than the rest of the published record. 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, 2013, and based on bathymetry during 2006 and aerial resurvey during 2009 by the U.S. Army Corp of Engineers. Total capacity at top of dam, 788,100 acre-ft at elevation 3,880.00 ft. Maximum flood control storage at top of spillway gates, 600,000 acre-ft at elevation 3,870.00 ft. Maximum recreation and conservation storage, 341,000 acre-ft at elevation 3,851.87 ft. Capacity at spillway crest, 220,000 acre-ft at elevation 3,840.00 ft. Elevation of no contents, 3,783.00 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.

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