Davenport Ionwave #27-14 Addendum 1

Eastern Avenue Widening and Signal Modification Project – City of Davenport

This opportunity involves the City of Davenport's Eastern Avenue Widening and Signal Modification Project, targeting roadway improvements and traffic signal upgrades. - Government Buyer: - City of Davenport, Iowa - Purchasing Division - OEMs and Vendors: - Iteris (required for Vantage Vector video detection equipment) - Products and Services Requested: - Roadway widening with new left-turn and northbound through lanes - Traffic signal modifications and upgrades - Iteris Vantage Vector video detection equipment (OEM-specified) - Controller equipment, wiring, handholes - Concrete pavement (9-inch PCC, 198 SY), driveway paving (7-inch PCC, 89 SY), sidewalk construction (4-inch PCC, 16 SY) - Subgrade preparation, granular stabilization, geogrid treatment, subbase installation - Stormwater infrastructure: subdrain (335 LF), connection to existing intake - Restoration: topsoil (13 CY), sod (117 SY), filter sock (300 LF), inlet protection device - Pavement markings: durable paint (12 stations), symbols/legends (2 each), removal (7 stations) - Temporary traffic control, construction survey, mobilization, concrete washout - Construction contingency ($10,000) - Unique/Notable Requirements: - Only Iteris Vantage Vector is approved for video detection; Miovision is not accepted - Compliance with Iowa SUDAS and City of Davenport Supplemental Specifications - Bid bond required for bids over $100,000; performance and maintenance bonds for awarded contracts - Insurance must meet specified limits - Good faith efforts to include Disadvantaged Business Enterprises (DBEs) - Electronic bid submission required - Engineer's estimate: $125,000 - Liquidated damages for late completion - All labor, materials, and equipment must be provided by the contractor.

Description

The City of Davenport is soliciting bids from qualified contractors for the Eastern Avenue Widening and Signal Modification Project located south of the Eastern Avenue and 29th Street intersection. The project involves widening the roadway to create a dedicated left-turn lane and a separate northbound through lane, upgrading traffic signals with new equipment, and making roadway improvements including concrete pavement widening, sidewalks, curb ramps, driveway apron replacements, topsoil and sod restoration, pavement markings, and erosion control. Bids must be submitted electronically through the City of Davenport e-bidding system by August 24, 2026. The project requires compliance with the Iowa Statewide Urban and Design Specification (SUDAS) and includes various contract conditions and insurance requirements.

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