Davenport Ionwave #27-21 Addendum 1

Union Station Flood Repairs Project – Construction, Flood Walls, Storm Sewer, and Landscaping

The City of Davenport, Iowa is seeking bids for the Union Station Flood Repairs Project, a comprehensive flood protection and infrastructure upgrade initiative. - Government Buyer: - City of Davenport, Iowa (City Hall) - Purchasing Division, contact: Tom Linehan - OEMs and Vendors Mentioned: - No specific OEMs are named for manufactured products; plan holders include construction and engineering firms such as Apollo Excavating, Brandt Construction Co, Centennial Contractors of the Quad Cities, Central Excavating Inc, County Materials Corporation, Dirty Hands Concrete LLC, Fehr Graham Engineering, General Constructors, Inc., Griffin Dewatering, LLC, Hawkeye Paving Corporation, Iowa Concrete Paving Association, Jones Contractors & Associates, Langman Construction, Inc., Leveraged Services LLC, Manatts, Inc., McCarthy Improvement Company, and MIDWEST CONCRETE, INC. - Products and Services Requested: - Construction of earthen berms, sheet pile flood walls, brick-faced freestanding floodwalls, and removable flood gates - Portland Cement Concrete (PCC) paving, storm sewer system installation (HDPE pipes, area inlets, manhole adjustments) - Site preparation: clearing, grubbing, excavation, subgrade and subbase preparation - Landscaping: topsoil placement (on-site and off-site), sodding, seeding (low mow fescue and native), plant installation - Erosion control: silt fence installation and removal, inlet protection devices, SWPPP management - Traffic control: temporary traffic control setup, traffic signs, flaggers - Additional services: compaction testing, construction survey, mobilization, concrete washout, railroad insurance, construction contingency - Unique or Notable Requirements: - Compliance with Iowa Statewide Urban and Design Specifications (SUDAS) and city-specific supplemental specifications - Insurance requirements for medium hazard projects, performance and payment bonds for bids over $100,000, and a four-year maintenance bond - Disadvantaged Business Enterprise (DBE) participation strongly encouraged, with mandatory good faith efforts - Railroad insurance and flagging required for work near railroad property; minimum elastic section modulus and moment of inertia for flood wall components - All bids must be submitted electronically via the city's e-bidding system - Quantities and Part Numbers: - Detailed line items include quantities for each construction and landscaping element (e.g., 5760 SF sheetpile flood wall, 1273 SY PCC paving, 1742 SF low mow fescue seeding, 3920 SF native seeding, 500 CY earthen berm) - Period of Performance: - 45 calendar days for completion, with contract time suspended during winter shutdown (November 15 to April 1); four-year maintenance bond required post-completion; liquidated damages for late completion.

Description

The City of Davenport is accepting bids for the Union Station Flood Repairs Project. The project includes construction of an earthen berm with sheet pile wall, free standing flood wall, removable flood gate, PCC paving, new storm sewer system, topsoil, sodding, landscaping, and erosion control. Bids must be submitted electronically through the City of Davenport e-bidding system by September 24, 2026. The project requires compliance with specific insurance, bonding, and contract conditions as outlined in the bid documents.

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