tide lock การใช้

C & O documents refer to it variously as Lock 0 and Tide Lock A.
All, except the wooden tide lock at Providence, were built of granite on a wooden foundation.
Technically, Richmond Lock is a half-tide lock and barrage, which also incorporates a public footbridge.
Canal documents sometimes list a " Tide Lock B " on section " I " which stood at the lockhouse at 17th and Constitution Ave NW . It was completed in 1834.
Commercial traffic also grew steadily, helped by the construction of new basins at Chester and the provision of a tide lock into the Dee, which made access into the lower basin possible at all times, and helped to keep it free from silt.