Davenport Ionwave #26-74 Addendum 2

City of Davenport 2026 Roller Compacted Concrete Alley Reconstruction Program

The City of Davenport, Iowa is seeking bids for its 2026 Roller Compacted Concrete (RCC) Alley Program, focused on reconstructing two city alleys with modern pavement and infrastructure upgrades. - Government Buyer: - City of Davenport, Public Works and Purchasing Division - Products and Construction Activities: - Removal of existing Portland Cement Concrete (PCC) and Hot Mix Asphalt (HMA) pavement - Installation of full-depth aggregate stone base and geofabric/geogrid materials as needed - Reconstruction with new PCC alley approaches and roller compacted concrete (RCC) pavement - Resetting utility surface features, driveway replacements, and sidewalk reconstruction (including ADA ramps) - Topsoil, sodding, and erosion control measures - Traffic control, signage, and construction surveying - Key Product Line Items (with quantities): - Roller Compacted Concrete Pavement, 6" (900 SY) and 6" Jointed (1570 SY) - Test Strip for RCC (1 LS, minimum 100 tons RCC) - Subbase, modified, 6" (2470 SY) - Subdrain, longitudinal, 6" (820 LF) - Curb and gutter (30-inch width, 7" thickness, 6" standard: 460 LF; 4" sloped: 102 LF) - Sidewalks (PCC 4": 69 SY; PCC 6": 23 SY; ADA curb ramp, PCC 8": 38 SY) - Driveways (PCC 7": 232 SY; Granular 7": 36 SY) - Erosion control, sodding, and decorative rock - Owner contingency allowance: $40,000 - Notable Requirements: - Adherence to Iowa SUDAS and City of Davenport supplemental specifications - Specific RCC mix design and strength requirements (e.g., 4500 psi compressive at 14 days) - Test strip for RCC required before full production - Coordination with property owners for subdrain cleanouts and protection of existing structures - Insurance and bonding requirements - No specific OEMs are named; materials must meet ASTM and SUDAS standards - Estimated contract value: $400,000–$500,000

Description

The City of Davenport is soliciting bids for the 2026 Roller Compacted Concrete Alley Program, which involves removal of PCC and HMA roadway pavement, installation of full depth aggregate stone base, geo fabric/grid materials if needed, reconstruction with PCC alley approaches and RCC pavement, utility surface feature resets, driveway replacements, sidewalk reconstruction including ADA ramps, topsoil and sodding, and erosion control. The project is located at two alleys in Davenport: Alley 1 between Wilkes Ave. and Hickory Grove Rd. from W. Locust St. to W. Pleasant St., and Alley 2 between Duggleby St. and Jersey Ridge Rd. from Duggleby St. to E. Locust St. Bids must be submitted electronically through the City of Davenport e-bidding system by June 23, 2026, 12:00 PM CT.

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