Photos
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West Elevation, Looking Southeast The vertical truss appears to be a component of this bridge, but is an optical illusion. It is not a component of this bridge but is a railroad bridge downriver. Photo taken by Carla Anderson, June 1990, for HAER |
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East Elevation, Looking West Photo taken by Carla Anderson, June 1990, for HAER |
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View North Across Deck Photo taken by Carla Anderson, June 1990, for HAER |
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View South, Across Deck Photo taken by Carla Anderson, June 1990, for HAER |
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East Sidewalk and Deck Photo taken by Carla Anderson, June 1990, for HAER |
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Detail, Railing and Post, Northeast Abutment, Looking East Photo taken by Carla Anderson, June 1990, for HAER |
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Operator's House Looking Northeast Photo taken by Carla Anderson, June 1990, for HAER |
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Northeast Abutment, Stairs and Railing Photo taken by Carla Anderson, June 1990, for HAER |
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AC Rheostat Controleers Motive power was supplied by 220v 3-phase AC motors that produced 25hp with a maximum starting torque of 306 pounds. Both leaves were controlled from here by these rheostat controllers, built by Westinghouse in Pittsburgh. See George Westinghouse Memorial Bridge for more about Westinghouse Electric Manufacturing Company. Photo taken by Carla Anderson, June 1990, for HAER |
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East elevation Photo taken by Carla Anderson, June 1990, for HAER |
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East Elevation Photo taken by Carla Anderson, June 1990, for HAER |
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South leaf raised position Photo taken by Carla Anderson, June 1990, for HAER |
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Detail, Rack and Pinon Gears Center girder, north leaf, looking west Photo taken by Carla Anderson, June 1990, for HAER |
Facts
- Overview
- Lost Bascule Bridge over Black River on I-94/I-69 Business Loop in Port Huron
- Location
- Port Huron, St. Clair County, Michigan
- Status
- Replaced by new bridge
- History
- Built 1012-13; Replaced 1991
- Builders
- - Detroit Steel & Bridge Co.
- McKenzie Bridge Co.
- Osborne Engineering Co.
- Strauss Bascule Bridge Co.
- Design
- "The Military Street Bridge is [was] the oldest surviving bascule highway bridge in Michigan and is an excellent example of the underneath counterweight trunnion design developed by Jospeh B. Strauss, an important twentieth century American bridge engineer.
"The Military Street Bridge is a double-leaf bascule bridge of the Strauss trunion type, with counterweights and the operating machinery located beneath the deck.
"Each leaf consists of three parallel steel girders, placed 13 feet apart, center to center, surrounded by a steel framework, 65 feet wide and 54 feet long, which in turn, supports the roadway and sidewalks."
--Dr. Charles K. Hyde, Department of History
Wayne State University
for Federal Highway Administration, Michigan DOT and HAER
June 1990 - Dimensions
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Length of largest span: 54 ft.
Total length: 108 ft.
Deck width: 65 ft.
- Also called
- I-94/I-69 Business Loop Bridge
- Approximate latitude, longitude
- +42.97556, -82.42417 (decimal degrees)
42°58'32" N, 82°25'27" W (degrees°minutes'seconds") - Approximate UTM coordinates
- 17/383871/4759084 (zone/easting/northing)
- USGS topographic map
- Port Huron
- Inventory number
- BH 37124 (Bridgehunter.com ID)
Sources
- J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
- HAER MI-38 - Military Street Bridge, Spanning Black River at Military Street, Port Huron, St. Clair County, MI