IL-170 (29th Road) Over Illinois River in Seneca: La Salle County, Illinois, United States
Metal 14 Panel Rivet-Connected Pennsylvania Through Truss, Fixed
Length: 1,510 ft.
Main Span: 364 ft.
Roadway: 23 ft.
Main Spans: 4
By: Wisconsin Bridge and Iron Company of Milwaukee, Wisconsin
Railroad (CSX) Over Illinois River in Seneca: Grundy County, Illinois, United States
Metal 6 Panel Pin-Connected Pratt Through Truss, Movable: Vertical Lift (Tower Drive) and Approach Spans: Metal 6 Panel Pin-Connected Pratt Through Truss, Fixed
Length: 650 ft.
Main Span: 180 ft.
Main Spans: 1
Special Bridge Conditions Legend: R - Former location of relocated bridge.
! - At risk for demolition or destruction.
X - Confirmed demolished or
- Dismantled and/or in storage.
Severe loss of historic integrity due to alteration.