SAI was responsible for the preliminary engineering, final design, shop drawing review, and consultation during construction for bridge preservations including the retrofitting/replacement of rocker bearings, structural repairs/strengthening, substructure repairs, deck joint replacements, and LMC overlays on nine bridges that carry I-80 in Clarion and Jefferson Counties, Pennsylvania.
- Bridges included: Emlenton Bridge, Beaver Creek EB and WB, Canoe Creek EB and WB, Deer Creek, Clarion River, and North Fork EB and WB.
- Nine bridges varying in length from 392′ to 1669′ with 4 to 8 spans (total of 57 spans) including deck trusses, multi-girder, and stringer/girder/floorbeam bridges over rivers, railroads, and natural valleys.
- Minimal approach work was involved on the 4-lane interstate highway with an ADT of 27,000.
- In-depth inspections, finite element analysis, non-destructive testing, structural analysis and load rating.
- Jacking bridge under full dead-load using 15 minute rolling closures for bearing replacements.
- All repairs were designed to be performed within the existing right-of-way.
- Significant structural analysis to provide a method for PennDOT to rate bridge with construction loadings.
- Used 3D analysis to prevent the need for expensive bridge strengthening.
- LMC overlays were used to extend deck life to the next full rehabilitation.
- Traffic maintained during construction via long-term single lane closures of I-80.
Client Owner: Pennsylvania Department of Transportation, District 10-0
Construction Cost: $49,400,000