Columbia Ionwave #BID038-25-26-KDD Addendum 1

Williams Street Connector Construction Project – City of Columbia, SC

The City of Columbia is seeking bids for the Williams Street Connector construction project, a major public works initiative to build and improve roads, sidewalks, utilities, and related infrastructure. - Government Buyer: - City of Columbia, Department of Procurement and Contracts - Project managed in part by Hussey Gay Bell (engineering consultant) - OEMs and Vendors Mentioned: - Contech (vehicular bridge supplier) - Products and Construction Materials Requested: - Roadway and sidewalk construction (approx. 4,700 ft new roads, 1,500 ft improved roads, 4,700 ft sidewalks) - Utility installation: water, sewer, storm drainage, communications duct banks, electrical conduit - Bridge construction: Williams Street vehicular bridge (Contech), bridge foundations, assembly, and deck - Retaining walls: sheet pile (NZ19 steel), segmental block - Stormwater management: reinforced concrete pipes (RCP) in multiple sizes, headwalls, water quality units (Arcadia, BaySeparator) - Sitework: demolition, earthwork, clearing/grubbing, erosion control, traffic control - Electrical and lighting: 35 light poles, 3 electric car charging stations - Landscaping: 232 trees, 267 shrubs, 422 grasses, 33,102 sq ft ground covers, irrigation system - Bike and pedestrian infrastructure: 2 bike share stations, cycle track curbs, wheel stops - Specialized geotechnical items: helical anchors (RS285.276), precast concrete anchor blocks, settlement monitoring, wick drains - Notable Requirements: - Vehicular bridge must be supplied by Contech - Contractors must have bridgework experience and be licensed/bonded - Emphasis on geotechnical stability, wetland mitigation, and settlement monitoring - Encouragement of Local and Disadvantaged Business Enterprise participation - Compliance with City and federal engineering standards - Bid bond and detailed subcontractor documentation required - Project includes both base and alternate bid items

Description

This is an Invitation for Bids for the Williams St. Connector Rebid project issued by the City of Columbia, SC. The solicitation includes construction work such as demolition, earthwork, storm drainage, water and sewer installation, roadway construction, electrical work, landscaping, and miscellaneous items. The project involves a non-mandatory pre-bid meeting held virtually and a site visit at Green and Huger Streets. Bidders must submit questions by July 24, 2026, and bids by August 14, 2026.

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