Cedar Rapids Ionwave #3311559-02 Addendum 2

Cedar Rapids Ellis Boulevard NW Levee, Floodwall, Roadway, and Utility Improvements

The City of Cedar Rapids is seeking a contractor to deliver flood protection and related street and utility improvements along Ellis Boulevard NW. - Buyer: City of Cedar Rapids, Public Works Department, Engineering division, Iowa. - Project: Ellis Blvd NW Levee and Floodwall Improvements, Contract 3311559-02; Water Project 2027003. The work extends from Q Avenue NW to Ellis Park. - Scope: Build an earthen levee and floodwall; remove, realign, and rebuild roadway, sidewalks, and shared-use path; install, replace, and remove water, sanitary sewer, and storm sewer infrastructure; and perform drainage, earthwork, traffic control, erosion control, and landscaping. - Notable specified materials: 5,100 SF of PZ-22 steel sheet piles and 1,467 LF of HP14x73 steel piles, including splicing items. These are material specifications, not OEM or brand names. - Requirements: Work is staged; maintain access to Ellis Park and its shop for City vehicles. Designated levee fill requires at least 30 days of settlement. Pile-driving vibration is limited to 1 inch per second peak particle velocity, with monitoring and pre- and post-work evaluation of nearby structures. Pile-driving hours are limited to 7:00 a.m.–5:00 p.m. A temporary concrete barrier may be required near 1845 Ellis Boulevard NW, depending on the status of the property. The roadway must reopen after the first two stages; a four-year maintenance period is specified. - Estimated probable cost: $4,530,000. - Named organization: HR Green, Inc. is identified as the project designer. No product OEMs or manufacturer brands are identified. IonWave is mentioned as the City's bid submission platform, not as a product vendor.

Description

The City of Cedar Rapids is requesting bids for construction of an earthen levee and floodwall, removal, realignment, and reconstruction of Ellis Blvd NW, and associated water main, sanitary sewer, and storm sewer improvements. Work is located on Ellis Blvd NW from Q Avenue NW to Ellis Park. The engineer’s opinion of probable cost is $4,530,000. The project includes vibration monitoring and specified construction milestones, with final completion scheduled for October 27, 2028.

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