Flaming Gorge Reservoir is the largest reservoir in Wyoming, on the Green River, impounded behind the Flaming Gorge Dam. Construction on the dam began in 1958 and was completed in 1964. The reservoir stores of water when measured at an elevation of above sea-level (maximum). Location The reservoir is mainly in southwest Wyoming and partially in northeastern Utah. The northern tip of the reservoir is southeast of Green River, Wyoming, southwest of Rock Springs, Wyoming, and the Southern tip is approximately north of Vernal, Utah. The lake straddles the Utah-Wyoming border. The nearby town of Dutch John, Utah, was built to serve as a base camp during construction of the dam, and as an administrative site afterwards. Geology The foundation of the reservoir is a steep-sided narrow canyon composed of siliceous sandstone and hard quartzites inter-bedded with softer shales, siltstones, and argillites. About east of the dam, a road cut has revealed a fault scarp on the southbound side with about of slippage. Recreation Visitors enjoy hiking, boating, fishing, windsurfing, camping, backpacking, cross-country skiing, and snowmobiling within Flaming Gorge National Recreation Area, which is operated by Ashley National Forest. Camp sites can be found close to the dam and along Highway 191 for a fee, as well as free throughout the area. Campgrounds operated by the U.S. Forest Service close in the winter months, with the exception of Dripping Springs near Dutch John. There are also public camp sites at Buck Board and Lucerne Marinas, along Highway 530 on the west side of the reservoir. The many available fish species in the reservoir and surrounding lakes are Colorado River Cutthroat trout, Brown trout, Rainbow trout, Lake trout, Kokanee salmon, Smallmouth bass, Burbot and Common carp. The Green River is a popular spot for fishing, mainly below the dam. The river's ice cold water and beautiful structure make it a world class, world-renowned fly fishing stream. See also List of largest reservoirs of Wyoming Further reading Webb, Roy (2012). Lost Canyons of the Green River: The Story before Flaming Gorge Dam. . External links Ashley National Forest: official Flaming Gorge National Recreation Area website Utah Division of Wildlife Resources: Flaming Gorge Reservoir from the Utah Division of Water Quality Flaming Gorge Fishing Info United States Bureau of Reclamation−USBR.gov: Flaming Gorge Dam Environmental Impact Statement Reservoirs in Utah Reservoirs in Wyoming Green River (Colorado River tributary) Lakes of Daggett County, Utah Lakes