Preliminary Design, Detailed Design, Construction Supervision and Post Construction Services for Bridge File 08352 over Leith River on Township Road 812 near the Town of Fairview
Upon review of the streambed, it appeared that the active degradation had stabilized, allowing a culvert to be a viable replacement option. By providing an SPCSP culvert as a replacement option opposed to a three span bridge, resulted in considerable cost savings to be achieved.
MPA provided a design that allowed for the existing bridge structure to be replaced with a culvert. The implementation of an SPCSP structure resulted in significant cost savings for Clearwater County while maintaining a level of service similar to that of a replacement bridge.
The original structure at this site was greatly undersized which resulted in numerous wash outs and overtopping of the roadway. Additionally, a large amount of drift commonly accumulates at this site. MPA’s design allow for the two pipe structure to be consolidated into a single barrel culvert replacement that adequately passes the design flow.
Custom concrete headwalls were designed to avoid the need for land purchase and fish habitat compensation measures. The new culvert was constructed completely within the existing right-of-way.
MPA prepared a design that maintained flow through the existing culvert by installing a culvert liner and increased the overall hydraulic capacity of the crossing by installing two additional welded steel pipes using the trenchless methods.
For more information on the services offered by MPA Engineering, or to request a quote, please contact us.
