# Cedar Rapids Ionwave #3311559-02 Addendum 1

Ellis Boulevard NW levee, floodwall, roadway, and utility improvements

**Posted:** October 21, 2026
**Respond By:** November 20, 2026
**Identifier:** 3311559-02 Addendum 1
**NAICS:** 237990, 237110, 237310

The City of Cedar Rapids Public Works Department is seeking a contractor for major flood-protection, roadway, and utility improvements along Ellis Boulevard NW.
- **Buyer and project:** City of Cedar Rapids, Iowa — Public Works Department / Public Works–Engineering. Ellis Blvd NW Levee and Floodwall Improvements, Contract 3311559-02, from Q Avenue NW to Ellis Park.
- **Estimated cost:** $4,530,000.
- **Scope:** Build an earthen levee and floodwall; remove, realign, and reconstruct the roadway; and improve water, sanitary sewer, storm sewer, pavement, sidewalks, traffic control, erosion control, and landscaping.
- **Major quantities:** Floodwall (1 LS); PZ-22 Grade 50 sheet piles (5,100 SF); HP14x73 steel piles (1,467 LF); 8-inch PCC roadway pavement (7,474 SY); 15-inch RCP storm sewer (1,726 LF); and 6-inch PE subdrain (2,153 LF). The full bid schedule is listed below.
- **OEMs and vendors:** No product OEMs or named construction vendors are specified. HR Green, Inc. is identified as the project designer, not as a product OEM or bidder.
- **Notable requirements:** Work is staged in four phases; maintain access to Ellis Park and its shop, and provide at least 30 days of settlement for designated levee fill. Pile-driving vibration is limited to 1 inch/second peak particle velocity, with vibration monitoring and evaluation of nearby structures. Pile-driving hours are limited to 7:00 a.m.–5:00 p.m. Minimum casing thicknesses are 0.250 inches for 16-inch casing, 0.312 inches for 30-inch casing, and 0.344 inches for 36-inch casing. If the home at 1845 Ellis Blvd NW remains in place, provide a temporary concrete barrier and driveway. Bypass pumping may be required if the force main cannot remain operational.
- **Schedule and maintenance:** Work is expected to start in 2027. Stages 1 and 2 are to be complete and Ellis Boulevard NW reopened by late 2027; final completion is expected in 2028. A four-year maintenance period is specified.
- **Bid schedule line items:** Quantities and bid-item codes are included in the product line-item list. Units are stated in each item description.

### Description

The project includes installing an earthen levee and floodwall, removing, realigning, and reconstructing 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 in Cedar Rapids, Iowa. The engineer’s opinion of probable cost is $4,530,000. The bid deadline is November 20, 2026, and final completion is October 27, 2028.

[View original listing](https://citycrbids.ionwave.net/PublicDetail.aspx?bidID=1963&SourceType=1)