Greenway Bridge Replacement
New bridge over Fever Creek.
New bridge and new abutments.
Revised trail and bridge alignment.
Adjusted trail alignment.
Construction is underway!
The old bridge.
Note the pipeline below. We took additional measures to adjust the new bridge alignment to avoid being over the utility pipe.
This project replaced an existing failed wood bridge on Fever Creek which is a tributary to Whatcom Creek. The project was procured for City of Bellingham Parks Department.
What We Did:
Hydrology model and HEC RAS modeling to determine maximum creek stage for Fever Creek.
Site assessment to determine best replacement strategies.
New plans showing the revised trail and bridge alignment.
Engineering for the abutments and bridge anchorage.
Civil engineering plans for geometric alignment, grading, and drainage
Temporary Erosion and Sediment Control Plans
Permitting support for the Hydraulic Project Approval (HPA) process.
We collaborated with the wetland consultants to creatively reduce wetland impacts.
Public bid contract documents and project specifications.
Construction administration was provided for shop drawing reviews, product reviews, contractor RFI’s, and final acceptance.
Hydrology model
This was created using LiDAR data to develop the overall contributing watershed upstream of the project site. Flows were calculated using existing rain fall data and land use characteristics.
Water levels..
The maximum stage of the stream at the project location was calculated using the flow information from our hydrology study. With the flow data, and topographic survey information we were able to model the stage using the U.S. Army Engineer Hydrologic Engineering Center (HEC) River Analysis System (RAS). The maximum calculated stage was then used to ensure the lower structural members of the bridge were above that stage.