SAI was responsible for the preliminary engineering, final design, and construction consultation of approximately 1 mile of realignment of SR 0028 and the replacement of a structurally deficient bridge over North Fork Pine Creek in Armstrong County, Pennsylvania. The realignment of SR 0028 will eliminated a section of substandard horizontal and vertical geometry and improved the intersection sight distances with adjacent intersections.
- 210′ two-span continuous steel multigirder bridge over the north fork of Pine Creek.
- Deck consists of two 12′ lanes with varying shoulder widths (8′ to 10′) for a deck area of 9,546′.4,400′ of roadway approach realignment on a two-lane regional rural arterial with an ADT of 6,550.
- Realignment of SR 0028 provided a way to maintain two lanes of traffic and provided a vertical alignment that met design criteria and eliminated two substandard horizontal curves.
- New structure was built approximately 200′ offline of the existing structure in order to improve substandard horizontal and vertical roadway geometry.
- Tangent structure with a 70 degree skew built on a curved roadway alignment. Substructure components consist of pile-supported integral abutments with a reinforced concrete wall pier on a spread footing.
- Traffic maintained via phased construction.
- Pavement design incorporates a “Rock Cap” to minimize undercut of the existing ground and reduced the proposed pavement structure.
- Stream relocation incorporated due to horizontal geometry improvements.
- Wetland mitigation incorporating riparian buffers.
- Stormwater management facility adjacent to wetland mitigation site.
- Phase III archeology performed due to historic and prehistoric findings during preliminary studies.
- Signing and pavement marking plan.
- Utility design and coordination.
- 2015 Outstanding Highway Engineering Award, ASHE Mid-Allegheny Section.
Client Owner: Pennsylvania Department of Transportation, District 10-0
Construction Cost: $6,400,000