USGS Water-Year Summary for Site 08067600

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

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

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USGS Water-Year Summary 2023

08067600 Lake Conroe near Conroe, TX

LOCATION - Lat 30°21'30", long 95°33'39" referenced to North American Datum of 1927, Montgomery County, TX, Hydrologic Unit 12040101, at service outlet tower at Conroe Dam on West Fork San Jacinto River, 140 ft upstream from centerline of dam, and 7.4 mi west of Conroe.

DRAINAGE AREA - 445 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Jan. 1973 to current year.

GAGE - Water-stage recorder. Datum of gage is NGVD of 1929. Satellite telemeter at station.

COOPERATION - The capacity table, furnished by the Texas Water Development Board dated July 19, 1996, is based on a survey of Apr. 1996.

REMARKS - The lake is formed by an earthfill dam 11,300 ft long, including a controlled spillway. The dam was completed Sept. 1, 1972, and deliberate impoundment began Jan. 9, 1973. Water is used for municipal and industrial purposes in the Houston metropolitan area. A small diversion is also made for cooling purposes at the Gulf State Utilities generating plant on Lewis Creek Reservoir near Conroe. A spillway with five 40- x 30-foot tainter gates is located near the center of dam. Low-flow releases are made through a separate multi-gated inlet tower. The tower has three gated openings and one uncontrolled opening. It is connected to a stilling basin and a concrete weir by a 14 ft diameter conduit through the dam. Data regarding the dam are given in the following table:

                                                                              Elevation (feet)
Top of dam............................................................          212.0
Design flood..........................................................          205.5
Top of tainter gates..................................................          202.5
Uncontrolled tower outlet.............................................          201.0
Crest of spillway (sill of tainter gates).............................          173.0
Lowest gated outlet (invert)..........................................          144.5

Some records listed in the "Period of Record" for surface water and water quality may not be available electronically. Beginning in the 2006 Water Year, water-quality data published with this site are now published as:

Site ID             Site name
302127095335501     Lk Conroe Site AC nr Conroe, TX
302132095333701     Lk Conroe Site AL nr Conroe, TX
302245095365301     Lk Conroe Site BC nr Conroe, TX
302320095334001     Lk Conroe Site CL nr Conroe, TX
302323095341201     Lk Conroe Site CC nr Conroe, TX
302448095374101     Lk Conroe Site DC nr Conroe, TX
302607095360901     Lk Conroe Site EC nr Conroe, TX
302714095372201     Lk Conroe Site FC nr Conroe, TX
303129095360501     Lk Conroe Site GC nr Conroe, TX

WATER-QUALITY RECORDS

PERIOD OF RECORD - CHEMICAL DATA: Sept. 1973 to current year. BIOCHEMICAL DATA: Sept. 1973 to current year.