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The Schooner Bayou Control Structure is a flood control structure located in Vermilion Parish, Louisiana, and operated by the U.S. Army Corps of Engineers. It is part of the Mississippi Valley Division, New Orleans District, which encompasses the southern half of the state of Louisiana. ==General information== It is located in the enlarged White Lake to Vermilion Bay channel opposite the abandoned Schooner Bayou Lock and approximately five miles southwest of Intracoastal City. The structure is accessible only by boat. The structure is a feature of the Mermentau River and Tributaries, Louisiana, project, authorized by the Flood Control Act of 18 August 1941, as modified by the Rivers and Harbors Act of 24 July 1946. The purpose of the structure is to aid in preventing saltwater intrusion into the Mermentau River Basin where it would interfere with irrigation of rice lands. It also aids in the prompt and efficient release of floodwaters that may occur within the basin. The structure is operated in conjunction with Calcasieu and Leland Bowman Locks on the Gulf Intracoastal Waterway (GIWW), Catfish Point Control Structure on the Mermentau River, and Freshwater Bayou Lock on the south side of the basin, all of which help prevent salt water intrusion into the Mermentau River Basin. The structure was constructed under contract with Keller Construction Corporation. Work was started on August 8, 1949, and was completed on May 22, 1951, at a cost of $672,829.18. There were no known problems encountered during construction on either contract. The Schooner Bayou Control Structure consists of two reinforced concrete gatebays, side-by-side, each equipped with a pair of 60-degree steel sector gates. The sill elevation of both gatebays is -12.0 with sidewalls extending to elevation 6.0. The gate structures are joined at the center of the channel and offset to each other so that adjacent gate recesses overlap. Timber guidewalls are provided on both approaches to the gatebays. The structure is protected from flanking flow by earth dikes constructed on both sides of the structure. The old Schooner Bayou Lock was closed by a dike, and a new channel was provided from White Lake through the new Schooner Bayou Control Structure to the GIWW. During high water the gates will be opened to permit passage of any vessel that can navigate against the current which can attain velocities of up to 15 knots. Vessels coming from East or West can bypass the floodgates by going through North Prong-Schooner Bayou into the Intracoastal Waterway SE of Forked Island at Mile Marker 167. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Schooner Bayou Control Structure」の詳細全文を読む スポンサード リンク
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