A Day's Pay According to tunnel records, the following pay rates were established for the 600-700 laborers required for this project:
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![St. Clair Tunnel](/sites/default/files/styles/landmark_node_/public/2018-03/St_Clair_River_Tunnel_-_Port_Huron_Michigan.jpg?itok=RwMpT9gm)
![Peterborough Hydraulic (Canal) Lift Lock](/sites/default/files/styles/landmark_node_/public/landmarks/images/Peterborough_Hydraulic_Canal_Lift_Lock.jpg?itok=b-EVqNbK)
Opened July 9, 1904, this lift lock is the highest of its type in the world, transferring boats between two water levels in a single 19.8 m (65 ft.) lift. Designed in place of conventional locks, which would have lengthed the time considerably to transverse a gradual drop, this lift lock was a unique solution made feasible. It operates on a balance principle. Each boat chamber is supported by a ram, 2.28 m (7.5 ft.) In diameter. These move up and down inside water-filled cylinders connected by a pipe.
Innovations
![Peterborough Hydraulic (Canal) Lift Lock](/sites/default/files/styles/thumbnail/public/landmarks/images/Peterborough_Hydraulic_Canal_Lift_Lock.jpg?itok=OtVEIP81)
Opened July 9, 1904, this lift lock is the highest of its type in the world, transferring boats between two water levels in a single 19.8 m (65 ft.) lift. Designed in place of conventional locks, which would have lengthed the time considerably to transverse a gradual drop, this lift lock was a…
Read More![St. Clair Tunnel](/sites/default/files/styles/thumbnail/public/2018-03/St_Clair_River_Tunnel_-_Port_Huron_Michigan.jpg?itok=CUl6Si_G)
A Day's Pay According to tunnel records, the following pay rates were established for the 600-700 laborers required for this project:
- 17.5 cents per hour for diggers
- 15 cents per hour for erectors
- 12.5 cents per hour for others
- One additional dollar…