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Murphy Bridge

Huntington County Bridge 19

Murphy Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: April 2, 2006

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Key Facts

Facility Carried / Feature Intersected
CR-800 South Over Salamonie River
Location
Rural: Huntington County, Indiana: United States
Construction Date and Builder / Engineer
1928 By Builder/Contractor: Pan American Bridge Company of New Castle, Indiana

Technical Facts

Rehabilitation Date
2006
Main Span Length
198 Feet (60 Meters)
Structure Length
200 Feet (61 Meters)
Roadway Width
18.7 Feet (5.7 Meters)
Spans
1 Main Span(s)
NBI Number
3500015

Historic Significance Rating (HSR)

Bridge Documentation

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

This is a beautiful 11 panel parker truss with riveted connections, and is seated on concrete abutments. Built in 1928 by the Pan American Bridge Company, it features a heavier design than pin connected designs of this type from decades before. V-lacing and lattice can be found all over this bridge with the exception of the diagonals and bottom chord where battens can be found linking the pairs of rolled beams together. Modern Armco railings have replaced any original railings that might have been on this bridge. Illinois mill marks can be found on the steel for the bridge. Rocker nest bearings are present on the structure. The bridge features a wooden deck with an asphalt layer on top, which may have been a replacement deck from the 1977 rehabilitation date given by the Indiana bridge inventory. A wooden deck seems out of place on a bridge built during this time period and concrete may have made up the original deck.

Information and Findings From DHPA Historic Bridge Survey

Statement of Significance

The only surviving Parker fabricated by this prolific Indiana firm, the structure is of rather standard pattern for its day and retains its original members including its decoratively latticed guardrails.

Architectural Description

Fabricated by the Pan-American Bridge Company of Newcastle, Indiana, and contracted by J. A. Crosbie, this 198' all-riveted Parker through is seated upon concrete abutments and wingwalls. Heavy laced channels of a single size (installed sidewise) divide the truss into eleven panels, the top chord for each being separately angled. Angles (growing lighter towards midspan) are riveted together with stay plates and are installed inward from top to bottom panel points as diagonals. Some are used as counters in the three most central panels. Riveted to gussets and verticals above the lower chord, girder floor beams support the asphalt-over-timber deck with its 19'7" roadway and 14'10" of vertical clearance.

As contractor for the job, J. A. Crosbie of Bluffton probably constructed the substructure and erected the trusses.

Bridge Considered Historic By Survey: Yes

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Photo Galleries and Videos: Murphy Bridge

 
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Maps and Links: Murphy Bridge

Coordinates (Latitude, Longitude):
40.712350,-85.453700

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