Lake O' the Pines

Lake O’ the Pines is a reservoir on Big Cypress Bayou, also known as Big Cypress Creek, chiefly in Marion County, Texas, USA. The reservoir also occupies a small part of Upshur and Morris Counties. The dam is located approximately 8.5mi west of Jefferson.HistoryLake O’ the Pines was created by the construction of the Ferrells Bridge Dam on the Big Cypress Bayou approximately 81mi upstream from the bayou's confluence with the Red River. The reservoir was created as part of the overall plan for flood control in the Red River Basin below Denison Dam in Oklahoma. The project was authorized by the Flood Control Act of 1946. Additional purposes of wildlife conservation, recreation, and water supply were added during construction. The U.S. Army Corps of Engineers began construction of the dam in January 1955 and the dam was completed on December 11, 1959.Dam and reservoirThe concrete-and-earthfill dam is 10600ft long. The crest of the spillway is 249.5ft above mean sea level. The conservation storage capacity is 250000acre.ft with a surface area of 18680acre. The bayou has a length of 140mi and a total drainage area of 850sqmi. The lake’s normal conservation pool is 230ft above mean sea level. The lake provides water supply storage for the Northeast Texas Municipal Water District which serves the cities of Jefferson, Ore City, Lone Star, Avinger, Hughes Springs, Daingerfield, and most recently Longview. The water supply storage exists in the conservation pool between elevations 201 to 230ft. Water intake structures are located at various points on the lake and one downstream of the lake. Discharges from the two gates in the control structure located on the southeast end vary from a minimum of 5cuft/s to a maximum of 3000cuft/s.