Author: Louis J. Shows

Publisher:

Published: 1979

Total Pages: 131

ISBN-13:

Locks and Dam 26 Replacement is proposed for construction on the Mississippi River about 2 miles downstream of the existing locks and dam at Alton, Illinois, as part of the program for the modernization of navigation facilities on the river. The project would replace the smaller existing structure with a large, modern structure designed to handle two-way traffic. The proposed structure would include two parallel locks separated by two 110-ft gate bays along the left bank and a dam consisting of a gated spillway and fixed overflow section. A fixed-bed model reproduced about 6.7 miles of the Mississippi River Channel, Ellis and Maple Islands, and the adjacent overbank areas to an undistorted scale of 1:120. The model study was concerned with the composition and configuration of the dam, arrangement and separation of the locks and lock walls, and navigation conditions in the lock approaches.