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CR-557 Bridge

CR-557 Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: October 1, 2012

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Key Facts

Facility Carried / Feature Intersected
CR-557 Over West Branch Escanaba River
Location
Rural: Marquette County, Michigan: United States
Construction Date and Builder / Engineer
1928 By Builder/Contractor: P.J. Nickel Company of Ironwood, Michigan and Engineer/Design: Michigan State Highway Department

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
72 Feet (22 Meters)
Structure Length
75 Feet (23 Meters)
Roadway Width
30 Feet (9.14 Meters)
Spans
1 Main Span(s)
NBI Number
6525

Historic Significance Rating (HSR)

Bridge Documentation

This bridge no longer exists!

Bridge Status: Demolished and replaced ca. 2018.

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

This bridge is noted for being an early example of a long-span steel stringer bridge. The bridge's single span 75 foot length was noteworthy at the time this bridge was built. Previously, spans of this length would have been more complex bridge types like a steel truss, or they would have been built as a multi-span stringer bridge, with shorter individual spans. The bridge is also an example of a bridge type built between 1927 and 1932 in Michigan, which was a steel stringer with aesthetic concrete encasement on the fascia beams, and also used a concrete balustrade railing. This bridge retains its original design, however the concrete balustrade railings are spalling severely. Suggested preservation work might be to replicate these original railings, something that has been done in modern times more than once here in Michigan. In contrast, the concrete encasement on the fascia beams appeared to be in good condtion.

Information and Findings From Michigan Historic Sites Online

Narrative Description

This single-span concrete steel bridge carries County Road 557 across the West Branch of the Escanaba River. The structure is configured as a 75-foot, steel stringer bridge, with rolled I-beams supported simply by massive concrete abutments with straight wingwalls. The outside webs of the spandrel stringers have been encased in concrete with a coved profile, giving the bridge an all-concrete appearence. The stringers carry a concrete deck, which has been surfaced with asphalt. This deck is bounded on both sides by MSHD standard concrete guardrails with classical fluted balusters and paneled bulkheads. Although unaltered, the West Branch Bridge has experienced serious concrete spalling on its guardrails.

Statement of Significance

Early in 1928 engineers for the Michigan State Highway Department delineated this concrete/steel bridge in Marquette County. The department designated the structure as Bridge B1 of 52-17-21 and in March awarded a contract for its construction to the P.J. Nickel Company of Ironwood. Nickel used a steel superstructure fabrication by the Massillon Bridge and Structural Company of Massillon, Ohio, to complete the West Branch Bridge later that year. Total contract cost: $20,016.19. Since its completion, the bridge has functioned in place, in essentially unaltered condition. The bridge's steel stringer configuration is one that MSHD used extensively for bridges in the 1930s and 1940s. Although the highway department had delineated a standard steel stringer design as early as the 1905-1906 biennium, the relatively shallow I-beams that were being fabricated by the steel mills limited their span - first to 30 feet, later 45 feet. When the mills began producing deeper beams in the late 1920s, MSHD could extend the spans of its steel stringer bridges. "When this type of structure was first put to use, "MSHD stated in 1930", rolled sections of sufficient strength were not available for spans greater than forty-five feet. It was necessary, therefore, to use relatively shallow fabricated deck girders for spans greater than forty-five feet. Rather recently, however, steel mills have improved their methods and are able to furnish rolled sections which, on proper spacing, are suitable for spans up to sixty feet." Built in 1928 with a span length of 75 feet, the West Branch Bridge is technologically significant as one of the first truly long-span stringer bridges undertaken by the highway department.

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Maps and Links: CR-557 Bridge

This historic bridge has been demolished. This map is shown for reference purposes only.

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