What does the grand river dam authority do? Grand River Dam Authority From Wikipedia, the free encyclopedia The Grand River Dam Authority (GRDA) is an agency of the state of Oklahoma created to control, develop, and maintain the Grand River waterway. It was created by the Oklahoma state legislature in 1935, and is headquartered in Tulsa, Oklahoma.What is the grand river district? Established as a “conservation and reclamation district for the waters of the Grand River” the new agency was charged with building dams along the river for the purposes of hydroelectric generation and flood control. GRDA responded with the construction of Pensacola Dam (Grand Lake) in 1940.How many hydroelectric power plants does the grand lake energy company own? It operates three hydroelectric facilities and two reservoirs, Grand Lake, Lake Hudson, and the Salina Pumped Storage Project, which includes W. R. Holway Reservoir, It also owns and operates the GRDA Energy Center (formerly named the GRDA Coal-Fired Complex).What is the grand river energy center grec? In the late 1970s, GRDA entered the thermal generation field with the construction of the two unit coal fired complex (known today as the Grand River Energy Center, or GREC), near Chouteau. Today, GREC is also home to GRDA’s new Unit 3 combined cycle gas plant.