La Biche River
After Replacement
Before Replacement
MPA effectively implemented the use of standard bridge components to span the large channel width while avoiding the increased costs associated with constructing a major bridge structure at this site.
The location of the stream crossing is at the bottom of a sag curve. MPA designed the standard bridge to match the existing vertical alignment. In doing so, costs associated with gradeline revisions were avoided. The existing structure was left in place to accommodate traffic during construction. MPA prepared revisions to the horizontal road alignment to tie into the new bridge
Roles and Responsibilities: Design, Tender Preparation and Management, Construction Supervision, Post Construction
Project Details
Location: Birch Grove, Alberta
Original Structure: 1 - 38.1 m long through truss with treated timber approach spans, built on a treated timber substructure.
Replacement Structure: 5 - 12.8 m long "SL-510" type pre-stressed concrete girder bridge on a galvanized steel substructure (64 m total length).
