City of Iowa Ionwave #22710220-473010 Addendum 1

City of Iowa City 2026 Summer Sidewalk Repair Project: Concrete Sidewalk Replacement and Repairs

The City of Iowa City Engineering Department is seeking contractors for the 2026 Summer Sidewalk Repair Project, which involves extensive sidewalk and curb ramp repairs across approximately 228 locations. Key procurement details include: - Replacement of concrete public sidewalks with Portland Cement Concrete (PCC) panels, including 7,086 square feet of 4-inch thick and 6,753 square feet of 6-inch thick sidewalks. - Removal of existing sidewalks totaling 13,839 square feet, with all removed concrete to be disposed of offsite within five calendar days. - Crack cleaning and filling of sidewalks using polyurethane elastomer sealant compliant with ASTM C 920, covering 190 linear feet. - Rebuilding select curb ramps to their original width as specified. - Installation of 24 square feet of detectable warnings. - Additional services including temporary traffic control, conventional seeding over 5,633 square feet, seeding with watering, warranty, fertilizing, mulching, and mobilization. - The project requires adherence to SUDAS Standard Specifications and supplemental requirements. - The engineer's estimate is approximately $285,000 after addendum adjustments, with a total project estimate initially at $430,000. - The period of performance spans from August 11 to October 30, with liquidated damages of $100 per day for delays. - No specific OEMs or vendors are named; materials must meet specified standards.

Primary OEMs are not specified, but polyurethane elastomer sealant and Portland Cement Concrete are key materials. Potential competitors include manufacturers of concrete and sealant products suitable for public infrastructure repair.

Description

This solicitation is for the replacement of concrete public sidewalks where specified in Iowa City. The project includes repair plan locations and clarifications as detailed in the addendum. The work is scheduled to start on August 11, 2026, and must be completed by October 30, 2026, with liquidated damages of $100 per day for delays. The engineer's estimate for the project is $430,000, with a revised unofficial estimate of approximately $285,000 after addendum adjustments. Contractors are responsible for offsite disposal of concrete not on City property, and no pre-bid meeting will be held.

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