Arkansas River And Tributaries Arkansas And Oklahoma Toad Suck Ferry Lock And Dam Conway Water Supply Foundation Report

Download or read book Arkansas River and Tributaries Arkansas and Oklahoma. Toad Suck Ferry Lock and Dam, Conway Water Supply Foundation Report written by Roy L. Crutchfield and published by . This book was released on 1983 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the foundation conditions encountered during the construction of a water supply dam for the city of Conway, Arkansas; such to replace a previous water supply that was adversely affected by the construction of the McClellan-Kerr Arkansas River Navigation System. The dam was founded on a thick shale layer of the Atoka Formation. Locally, the shale was gray to black, hard to moderately hard, sandy, and well compacted. Excavation of a 10-foot wide centerline cutoff core trench in the shale posed no problems with standard earth-moving equipment. Pre-split blasting was required in excavating the outlet works stuctures and emergency spillway. The report gives the results of a well-point dewatering system installed in the valley section that did not function adequately, and methods to overcome ground-water flow at the rock/overburden contact. Foundation preparation and treatment consisted of wash/air jetting, mortared open joints, concrete fillets, and rock anchoring. The report details the installation of a grout curtain utilizing the stop-grouting, split spacing method.