17264 Cheboygan Lock Downstream Wall - Historical Drawings.pdf

This document is a collection of historical drawings related to the Cheboygan Lock Downstream Wall project. The file contains engineering drawings spanning from 1952 through 1989, documenting the evolution and modifications of the Cheboygan Navigation Lock structure. The included drawings cover the 1952 Navigation Lock Bridge design, 1967 Gate Installation and Spillway Modification work, 1980 Butterfly Valve as-built specifications, 1988 proposed Lock Gate replacement designs, and 1989 shop drawings from Actron Steel for lock gate fabrication and installation.

The drawings serve as historical documentation of the lock's structural and mechanical systems over a 37-year period. These historical records provide baseline engineering information for the downstream wall project and capture the incremental improvements and replacements made to the navigation lock's infrastructure. The compilation of these drawings from multiple years and sources offers a comprehensive record of the facility's technical specifications and construction history, which would be essential reference material for current or future rehabilitation, maintenance, or replacement projects at the Cheboygan Lock facility.