Construction of the Fremont Canyon Powerplant and power conduit was begun in 1956 and completed in 1961. Construction of Gray Reef Dam and Reservoir was started in 1959 and completed in 1961. Benefits Irrigation Water is released from Glendo Reservoir to supplement the irrigation water supplies of contracting users in Wyoming and Nebraska. The water users need dependable storage in addition to their natural flow water rights. This makes possible the improvement of crop production and an increased crop yield.
Principal crops are beans, potatoes, alfalfa, corn, and small grains.
The Unit provides opportunities for recreation, fishing, and hunting. Camping, picnicking, boating, and water sports opportunities are available at Glendo Reservoir. A boat ramp, accessible restroom, accessible fishing pier, picnic tables, and campground are located immediately below Gray Reef Dam. Glendo Reservoir is stocked with fish by the Wyoming Game and Fish Commission and, to a lesser extent, fishing is afforded at Gray Reef Reservoir. Hunting for waterfowl is available at both reservoirs.