Editing Keystone Lake (section)

==General description==
Keystone Lake is about {{convert|23600|acre|km2}} in area, and was designed to contain {{convert| 505381|acre.ft|m3}} of water.<ref name = "lakelubbers">[http://www.lakelubbers.com/keystone-lake-664/ "Keystone Lake, Oklahoma" Lakelubbers.com] Accessed October 22, 2016</ref> It was named for the community of Keystone, which existed on the site from 1900 until 1962, when it was inundated by the waters of the lake.{{efn|The community had been given its name early in the 20th Century because it was in a key location at the confluence of the Cimarron and Arkansas Rivers.<ref name = "KeystoneOK"/>}} Construction of the lake forced the relocation of three other towns: [[Mannford, Oklahoma]] (also known as New Mannford by locals), [[Prue, Oklahoma|Prue]] (also known as New Prue), and Appalachia Bay, Oklahoma. The town of [[Osage, Oklahoma|Osage]] was partially abandoned to the lake, while the rest clings to the south shore. Engineers built a levee around low-lying areas of the south and east sides of [[Cleveland, Oklahoma]] to prevent flooding of that city.<ref name="KeystoneOK"/> The shoreline extends for {{convert|330|mi|km}}.<ref name = "KeystoneOK"/>

Two Oklahoma state parks, [[Keystone State Park (Oklahoma)|Keystone State Park]] and [[Walnut Creek State Park]], are located along the shores of the lake offering camping, hiking and biking trails, fishing, swimming and boating opportunities. The area also features a Yogi Bear's Jellystone Park Camp-Resort as you cross the Keystone Dam near Sand Springs.

The Keystone Lake project was authorized by the [[Flood Control Act of 1950]]. It was designed and built by the Tulsa District, Army Corps of Engineers. Construction began in January 1957 and was complete for flood control purposes in September 1964. Commercial operation of the power generating facility began in May 1968.<ref name = "KeystoneOK"/>

A reregulating dam, located {{convert|7.8| miles|km}} downstream of the main dam, was also completed in 1968. Cost of the total project was approximately $123 million. In 1986, the reregulating dam was removed due to public safety issues, as 16 people had drowned at the dam.<ref name = "KeystoneOK"/>