Eagle Mountain Dam and Lake (Trinity River Basin)

Eagle Mountain Lake Service Spillway (Old) (Photo by owner)Eagle Mountain Dam and Lake (formerly Eagle Mountain Reservoir) are located about 5 miles northwest of Fort Worth, on the West Fork Trinity River just north of Lake Worth in northwestern Tarrant County.  It is owned and operated by the Tarrant Regional Water District for water supply, irrigation, flood control and recreational purposes.  Permit for constructing the dam was authorized by State Board of Water Engineers on May 1, 1928.  Construction of the dam began on January 23, 1930, and was completed October 24, 1932.

Deliberate impoundment of water began on February 28, 1934.  The dam is 85 feet high and 4,800 feet long with the top of dam at elevation of 682 feet above mean sea level. Maximum design water surface may reach to 680.23 feet above mean sea level, while the top of flood control pool is at elevation of 668 feet above mean sea level. The emergence spillway is on natural ground located between dam and concrete spillway with a width of 1,300 feet and a crest elevation at 676 feet above mean sea level (at the top of fuse plug which is measure 6 feet height). On July 31, 1971, construction on a new service spillway was completed by adding a new concrete side channel ogee to control the discharge through a 25 feet square conduit. The crest of this new 6-roller gate controlled service spillway is at 637 feet above mean sea level, with the top of gate at 659 feet above mean sea level. The crest of the old service 4-vertical lift gate controlled service spillway (shown in the photo above) is at 649.1 feet above mean sea level.  The reservoir has a normal capacity of 179,880 acre-feet and a surface area of 8,694 acres, at the conservation pool elevation of 649.1 feet above mean sea level.  The drainage area of the West Fork of the Trinity River at Eagle Mountain Dam is 1,970 square miles.

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