Filling flues beneath lock floor (1 of 2)

Photograph showing a view looking west with the twelve large passageways beneath the lock floor that deliver water from the upper river to the lock chamber when it is being filled. The passages continue the length of the lock, exiting below the lower gate and also emptying the lock.
Abstract/Description: Photograph showing a view looking west with the twelve large passageways beneath the lock floor that deliver water from the upper river to the lock chamber when it is being filled. The passages continue the length of the lock, exiting below the lower gate and also emptying the lock.
Subject(s): Boats and boating
Soo Locks (Mich.)
Date Created: 1912 (approximate)