0013Q Corridor-Ashaway_DOQ Item 203.0310_Addendum-2.pdf

This addendum document supports the Rhode Island Department of Transportation's Corridor-Ashaway bridge replacement project, specifically detailing structural excavation and masonry work for Bridge No. 005051, a north stone retaining wall. The addendum provides calculations for the retaining wall construction, including three distinct sections: a primary wall measuring 42 feet in height by 2 feet in width by 7 feet in length (588 cubic feet), an around-abutment section of 1.5 feet height by 2 feet width by 4 feet length (12 cubic feet), and an additional section of 6 feet height by 40 feet width by 3 feet length (720 cubic feet). The total calculated volume is 1,320 cubic feet, equating to approximately 50 cubic yards of structural excavation masonry work. This addendum was computed on August 27, 2026, and represents detailed construction specifications for the larger Corridor-Ashaway project, which involves the replacement of three bridges (Bridge Nos. 005051, 005151, and 005251) spanning bodies of water in Providence County with proposals due August 28, 2026.

The addendum establishes that lump sum item breakdowns are due within 70 days of apparent low bidder notification, with phased completion deadlines of November 10, 2027 for the Ashaway River Bridge and August 14, 2028 for the Potter Hill Bridge, and substantial completion by October 23, 2028. The project is federally funded through the Federal-Aid Highway program with 80% FHWA funding and 20% state funding under FAP Number STP-3334(001). All work is subject to Davis-Bacon prevailing wage requirements effective May 18, 2026, and Buy America compliance mandates requiring 55 percent domestic content for manufactured products. Liquidated damages are assessed at $3,500 per day for phase completions and $1,950 per day for substantial completion milestones. A 5% bid bond and 100% performance bond are required, along with insurance coverage including $1,000,000 general liability and workers' compensation. A 0.33% contract administrative fee applies to the project.