- Improved public safety and seismic protection
- Increased transportation capacity for existing and future traffic volumes
- Added bicycle and pedestrian path, separated from vehicular traffic by safety rails
- Replacement bridge alternative minimizes the cumulative impacts to the environment
- Compressed design schedule succeeds in meeting Federal Garvey funding deadline
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Sakonnet River Bridge
Commonwealth Engineers & Consultants, Inc.
Portsmouth and Tiverton, Rhode Island
The replacement of the Sakonnet River Bridge, which carries nearly 40,000 cars per day and provides a critical transportation system link between Massachusetts and Rhode Island, is necessary to meet current highway design standards for shoulder width and structural capacity. The new $120 million, 3,160-ft-long, 4-lane bridge will be built along an alignment located immediately south of the existing bridge, which will remain in operation during construction.
Haley & Aldrich completed an extensive subsurface exploration program, provided recommendations for design of shallow and deep foundations, designed excavation support systems for construction of multiple bridge structures, estimated costs for two bridge super structure alternatives, and implemented a deep foundation test program. The entire design period was compressed into 21 months to meet a special Federal Garvey funding deadline. The new bridge is expected to open in 2011.