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USGS Water-Year Summary 2024
08167700 Canyon Lake near New Braunfels, TX
LOCATION - Lat 29°52'07", long 98°11'55" referenced to North American Datum of 1927, Comal County, TX, Hydrologic Unit 12100201, in intake structure of Canyon Dam on Guadalupe River, 12 mi northwest of New Braunfels, and at mile 303.0.
DRAINAGE AREA - 1,432 mi².
REVISIONS HISTORY - WSP 2123: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1962 to Sept. 2000 (U.S. Army Corps of Engineers furnished contents), Oct. 2000 to Sept. 2002 (contents), Oct. 2002 to current year. Prior to Oct. 1970, published as "Canyon Reservoir".
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Oct. 1964 to Apr. 1980.
BIOCHEMICAL DATA: Oct. 1964 to Sept. 1976.
BIOLOGICAL DATA: Aug. 1975.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Sept. 24, 1964, nonrecording gage at present site and datum. Satellite telemeter at station.
REMARKS - Records fair. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically. The lake is formed by a rolled earthfill dam 6,830 ft long, consisting of the main dam 4,410 ft long, an earthen dike 210 ft long, a 1,260-foot-long uncontrolled broad-crested-type spillway, and a 950-foot concrete and earthen non-overflow section. Deliberate impoundment began June 16, 1964, and main part of dam was completed in Aug. 1964. The flood-control outlet works consist of a 10.0-foot-diameter conduit controlled by two 5.7 by 10.0-foot hydraulically operated slide gates. The dam is owned by the U.S. Army Corps of Engineers. The lake was built for water conservation and flood control. Small diversions above the lake for irrigation. Conservation pool storage is 378,852 acre-ft. Data regarding the dam are given in the following table:
Elevation (feet)
Top of dam.................................................... 974.0
Crest of spillway............................................. 943.0
Top of conservation pool...................................... 908.6
Lowest gated outlet (invert).................................. 775.0
Water-quality records available from Apr. 1971 to Aug. 1995 were published separately as:
Site ID Site name 295148098115201 Canyon Lk Site AR nr New Braunfels, TX 295206098115501 Canyon Lk Site AC nr New Braunfels, TX 295210098142001 Canyon Lk Site BR nr New Braunfels, TX 295224098115901 Canyon Lk Site AL nr New Braunfels, TX 295235098133501 Canyon Lk Site BL nr New Braunfels, TX 295240098152001 Canyon Lk Site CC nr New Braunfels, TX 295241098132101 Canyon Lk Site BC nr New Braunfels, TX 295327098185701 Canyon Lk Site GC nr New Braunfels, TX 295329098151001 Canyon Lk Site EC nr New Braunfels, TX 295349098143101 Canyon Lk Site DC nr New Braunfels, TX 295349098173701 Canyon Lk Site FC nr New Braunfels, TX
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 831,800 acre-ft, July 6, 2002, elevation, 950.28 ft; minimum observed since conservation pool first reached in Apr. 1968, 311,200 acre-ft, Nov. 24, 1984, elevation, 899.85 ft. Minimum elevation, 890.70 ft, Sept. 30, 2023.
