French Prairie Bridge Project FAQs
The French Prairie Bridge Project aims to identify the location, bridge type and uses of a new proposed bicycle, pedestrian, and emergency access bridge crossing of the Willamette River in Wilsonville.
The City of Wilsonville is leading the French Prairie Bridge Project.
The purpose of the French Prairie Bridge Project is to address key questions about the bridge design, landing points, and costs and thereby help position the City and its partners to decide whether to pursue final bridge design and construction.
Project planning began in fall 2016. The project aims to complete preliminary design of the French Prairie Bridge by early 2020.
After this project is complete, the City of Wilsonville and its regional partners will have the information needed to determine whether to pursue final design and construction of the French Prairie Bridge Project.
The study area for potential bridge alignments is between the I-5 Boone Bridge and the existing Portland and Western Railroad Bridge in Wilsonville.
In 2015, the City of Wilsonville conducted a feasibility study to determine the project’s study area. Due to significant challenges associated with potential east side bridge locations (including topography and property impacts), the City Council decided that the current project should focus on alternative locations between the I-5 Boone Bridge and the Portland and Western Railroad Bridge.
This has not yet been determined. The project will address key questions about use, including what type of emergency response vehicles could access the structure. This information will help refine project design criteria (e.g. bridge width, ramp connections, weight it can carry).
The cost for planning and preliminary engineering design is $1.38 million. This includes the cost for conducting planning and engineering work, public involvement and necessary work to assess impacts to wetlands and wildlife, among other topics.
The project is funded through a $1.25 million federal grant issued through Metro’s Transportation Improvement Program – Regional Flexible Funds, and 10.27% local matching funds provided through the City of Wilsonville’s Parks Systems Development Charges.
This project will develop cost estimates for completing final design and construction. To develop these estimates, the team will need to determine key elements of the design such as its location, bridge type, and size, and terminus connection points.
In earlier planning phases, very rough cost estimates were developed. These estimates provided a sketch of potential costs with the information known at the time. This preliminary design project will answer many questions needed to develop a refined cost estimate, including location, bridge type and size.
This has not yet been determined. This project will develop a cost estimate and document potential community impacts and benefits. Regional leaders will use this information to determine if they would like to pursue final design and construction of this project.
Funding could come from a number of sources, including grants and federal, state or local funds.