Lost Bridge, 1.5 miles SE of Denver, in Miami County, Indiana. Intersected-CR-100 East over Eel River. Construction Date-1920. Structure Length-230', Main Span-112'. Structure Type-Two Span, Metal 7 Panel Bolt-Connected Pratt Through Truss, Fixed. Builder/Contractor-Rochester Bridge Company of Rochester, Indiana. Rehabilitation Date-N/A. Inventory Number-5200022. GPS: 40.855390, -86.055900. (Although this bridge overall has the appearance of a riveted truss bridge, the truss connections are actually bolted, making this bridge uncommon for its age.)
Statement of Significance
Seated upon a concrete pier, abutments, and wingwalls, these two largely-bolted, Pratt through spans extend 227' in seven panels for each pair of trusses. A pair of laced heavy channels provides each intermediate vertical, and a pair of angles riveted together with battens supplies the diagonal and counter sets. Only the center panel is countered. The I floor beams are bolted to the verticals below the lower chord. The bridge carries an asphalt-over-timber deck with a 15'10" roadway and 14'6" of vertical clearance. Bolted Pratt through structures are not plentiful in Indiana, especially two-span ones. The design of these trusses is quite standard. The undecorated bridge retains its original members.
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