Allegheny County, Pennsylvania
SAI was responsible for the preliminary design, final design, and consultation during construction for the repairs of 27 span structures located within the limits of the I-79/SR 0065/SR 0051 interchanges, which includes the main steel thru-tied arch span over the Ohio River, and the associated deck girder approach spans. In addition, this project includes 8 ramps, and the adjacent Glenfield viaduct bridge.
Physical features:
- 725′ main span steel thru-tied arch over the Ohio River and associated deck girder approach spans and ramps.
- 10-span curved steel Glenfield viaduct.
Other features:
- Multiple PS&Es grouping various structures.
- In-depth bridge inspection.
- Fatigue repair details.
- Expansion dam repairs including main span expansion dams repair.
- Deck sounding, concrete repair, and LMC replacement.
- Substructure repairs and numerous rocker bearing replacements.
- Full superstructure painting.
- Miscellaneous steel repairs including girder splice plates.
- Sign structure repairs.
- Updating analysis, live load ratings, and paint loading, including tied-arch.
Client Owner: Pennsylvania Department of Transportation, District 11-0
Completion Date: 2023
Cost: $44,100,000
