Skip to main content

ON

St. Clair Tunnel
Society: ASCEMain Category: CivilSub Category: TunnelsEra: 1890-1899DateCreated: 1891Beneath the St. Clair RiverSarniaState: ONZip: N7T 8G8Country: CanadaWebsite: http://www.asce.org/Project/St--Clair-Tunnel/Creator: Hobson, Joseph , Beach, Alfred

A Day's Pay According to tunnel records, the following pay rates were established for the 600-700 laborers required for this project: 

YearAdded:
1991
Image Credit: Public DomainImage Caption: Postcard of the west end St. Clair River Tunnel in Port Huron, Michigan, United States.Era_date_from: 1891
Peterborough Hydraulic (Canal) Lift Lock
Society: ASMEMain Category: MechanicalSub Category: Water TransportationEra: 1900-1909DateCreated: 1904353 Hunter St EastPeterboroughState: ONCountry: CanadaWebsite: https://www.asme.org/about-asme/who-we-are/engineering-history/landmarks/205-peterborough-hydraulic-canal-lift-lockCreator: Rogers, Richard Birdsall , Dominion Bridge Company

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.

YearAdded:
1999
Image Credit: Courtesy Flickr/Mac Armstrong (CC BY-SA 2.0)Image Caption: Peterborough Hydraulic Canal Lift LockEra_date_from: 1904
Subscribe to ON

Innovations

Peterborough Hydraulic (Canal) Lift Lock

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

A Day's Pay According to tunnel records, the following pay rates were established for the 600-700 laborers required for this project: 

  1. 17.5 cents per hour for diggers 
  2. 15 cents per hour for erectors 
  3. 12.5 cents per hour for others 
  4. One additional dollar…
Read More

We hope you enjoyed this essay.

Please support America's only magazine of the history of engineering and innovation, and the volunteers that sustain it with a donation to Invention & Technology.

Donate

Stay informed - subscribe to our newsletter.
The subscriber's email address.