Historic Bridges: Chippewa County, Michigan

10 Mile Road Bridge
HSR

10 Mile Road Over Charlotte River in Rural: Chippewa County, Michigan, United States

Metal 3 Panel Rivet-Connected Warren Pony Truss, Fixed

Length: 52 ft. Main Span: 51 ft. Roadway: 16.1 ft. Main Spans: 1

Built 1914 By: Minneapolis Bridge Company of Minneapolis, Minnesota

A rare example of a lightweight style pony truss.

10 Mile Road Bridge
Dafter Road Bridge
HSR

10 Mile Road (Dafter Road) Over I-75 in Rural: Chippewa County, Michigan, United States

Metal Stringer (Multi-Beam), Fixed

Length: 357 ft. Main Span: 79 ft. Roadway: 24 ft. Main Spans: 6

Built 1964 By: Pierson Contracting Company and Raff and Dexter of Lansing, Michigan and Michigan State Highway Department

Featuring unusual steel bent supports, this is a smaller and more modified version of the M-48 Bridge also in this county.

Ashmun Street Bridge
HSR

Ashmun Street (I-75 BS) Over Power Canal in Sault Ste Marie: Chippewa County, Michigan, United States

Metal Two-Hinged Braced Ribbed Through Arch, Fixed

Length: 257 ft. Main Span: 257 ft. Roadway: 42 ft. Main Spans: 1

Built 1935 By: Fry and Cain and Michigan State Highway Department

One of the most beautiful and rarest bridges in Michigan, this unique, massive trussed steel arch bridge provides an impressive clear span over the canal.

East Portage Avenue Bridge
HSR

East Portage Avenue Over Power Canal in Sault Ste. Marie: Chippewa County, Michigan, United States

Metal Tied Solid Ribbed Through Arch, Fixed

Length: 265 ft. Main Span: 265 ft. Roadway: 45 ft. Main Spans: 1

Built 1970 By: American Bridge Company of New York, New York

One of two identical arch bridges in Sault Ste Marie.

S
Fort Street Bridge
HSR

Fort Street Over Power Canal in Sault Ste. Marie: Chippewa County, Michigan, United States

Metal Pin-Connected Pennsylvania Through Truss, Fixed

Length: 234 ft. Main Span: 232 ft. Main Spans: 1

Built 1902 By: New Castle Bridge Company of New Castle, Indiana

A gorgeous example of its type, this is one of only two Pennsylvania truss bridges in Michigan.

International Bridge
Sault Ste. Marie International Bridge
HSR

I-75 / TC-17B Over St. Marys River and Associated Canal System in Sault Ste. Marie: Chippewa County, Michigan and Algoma District, Ontario, Canada and United States

Metal Cantilever (Arch and Suspended Deck) Bolt-Connected Warren Through Truss, Fixed and Approach Spans: Metal 8 Panel Bolt-Connected Warren Deck Truss, Fixed

Length: 9,281 ft. Main Span: 430 ft. Roadway: 28 ft. Main Spans: 7

Built 1962 By: Bethlehem Steel Company of Bethlehem, Pennsylvania and Raff and Dexter of Lansing, Michigan and Steinman, Boynton, Gronquist and London of New York, New York

This is the monumental 2 3/4 Mile long highway bridge in Sault Ste Marie.

International Railroad Bridge
Sault Ste. Marie International Railway Bridge
HSR

Railroad (Wisconsin Central) Over St. Marys River and Associated Canal System in Sault Ste. Marie: Chippewa County, Michigan and Algoma District, Ontario, Canada and United States

Metal 8 Panel Pin-Connected Camelback Through Truss, Fixed and Approach Spans: Metal 12 Panel Rivet-Connected Pennsylvania Through Truss, Movable: Double Leaf Bascule (Heel Trunnion)

Length: 5,580 ft. Main Span: 369 ft. Roadway: 21 ft. Main Spans: 9

Built 1887 By: Dominion Bridge Company of Montréal, Québec and Strauss Bascule Bridge Company (Strauss Engineering Company) of Chicago, Illinois

Highlights of this complex of bridge spans include an 1895 swing span, Camelback trusses from 1887, a rare design of bascule from 1913, and a 1960 vertical lift span.

M-123 Bridge
HSR