We are finally moving forward with replacing the two interstate bridges that are structurally deficient and seismically vulnerable. Lots to consider:
First, there is a rapidly developing waterfront east and west of the existing bridges that will be completed before bridge construction even starts. The developments as proposed create a narrow corridor for new bridges.
Second, the minimum clearance under the structure is required to be 135 feet. Anything less than this handicaps shipping. A tall, fixed structure will be aesthetically ugly and severely detract from the revitalized waterfront. The cost and construction time would more than double, and project length will be miles longer in each direction.
Third, the I-5 congestion period will be 12 hours per day or worse by the time construction starts. Fast-track project development, Alternative Project Delivery Procurement and Accelerated Bridge Design and Construction are absolutely necessary.
