Cedar Rapids Ionwave #3318551-01 Addendum 3

Cedar Rapids 8th Avenue Bridge Replacement, Floodwalls, and Transportation Improvements

The City of Cedar Rapids Public Works Department is seeking bids for a major bridge replacement, floodwall, and transportation-improvement project along the Cedar River. - Buyer and project - City of Cedar Rapids, Iowa — Public Works Department. - 8th Avenue Bridge Replacement and Floodwalls at Cedar River, near 8th Avenue SE/SW and Diagonal Drive SW. - Scope of work - Demolish the existing bridge and construct a new cable-stayed bridge, floodwalls and related flood-control components, approach roads, traffic improvements, sidewalks, trails, utilities, and lighting. - Complete associated pile, shaft, earthwork, paving, landscaping, erosion-control, and monitoring work. - Key bid items and quantities - Stay Cable System — 1 lump-sum system, part number SP-020; must include HDPE sheathing and the integral passive ice-management profile. - Steel HP 14 x 73 piles — 17,080 LF, part number 2501-0201473. - Demonstration Shaft — 65 LF, part number 2433-0003000. - Subbase Modified 6-inch — 15,221 SY, part number 2010-J; Shared Use Path PCC 8-inch Class C Mix — 1,471 SY, part number 7030-C; Sidewalk PCC 6-inch Class C Mix — 3,526 SY, part number 7030-E. - Sod — 15,558 SY, part number 9020-A; Filter Sock 12-inch — 12,981 LF, part number 9040-D-1; Filter Sock Removal — 12,981 LF, part number 9040-D-2; Removal of Light Poles — 12 EACH, part number 2401-6745765. - Test pile report items: four HP 14x73 H-piles, 50 feet each; and two PZC-26 sheet piles, 50 feet each. - Notable requirements and project constraints - The stay-cable system is treated as a manufactured product for applicable U.S. manufacturing requirements. The contractor must provide detailed product, supplier, component-origin, cost, manufacturing-process, and traceability information for FHWA review and obtain required project-specific written concurrence. - The specified integral ice-management profile may not be deleted or replaced without required written approvals. Addendum No. 3 clarifies that no corrosion-protection coating is required. - Micropiles require Type A gravity/tremie grouting; production piles require proof testing, while pre-production sacrificial verification piles are not required. Drilled-shaft steel casing must remain in place. - Salvage 600 feet of existing railing for public distribution after on-site storage, 40 feet of railing and posts for public art, and at least 16 feet of variable-depth steel girder. - Lead was detected in existing bridge paint; applicable removal provisions and protections for the public, utilities, and nearby structures apply. Pile driving requires attention to vibration and noise impacts; test monitoring found levels below structural-damage thresholds but above human-disruption limits at the Courthouse. - MSE wall design criteria include a 250-psf surcharge, 75-year service life, and minimum 4-foot embedment. Wall 7 requires longer-than-typical reinforcement and ground improvement; settlement improvements are also identified for Walls 5 and 6. - Named companies and value - Stanley Consultants is named in connection with the MSE wall stability calculation. No product OEM or supplier is identified in the provided materials. - Engineer’s opinion of probable cost: approximately $123 million. - Performance period - Work is anticipated to begin upon Notice to Proceed, expected in early 2027, with final completion required within 1,250 calendar days. No option years or annual subscription are specified.

Description

The public improvement generally includes demolition of the existing bridge and construction of a new cable-stayed bridge crossing the Cedar River, integral flood-control system components, approach roadways, traffic improvements, sidewalks, trail reconstruction, utility reconstruction, and lighting. Work is located in Cedar Rapids, from 1st Street SW to 3rd Street SE along 8th Avenue SE/SW and Diagonal Drive SW. The source states an engineer’s opinion of probable cost of $123,000,000 and final completion within 1,250 calendar days. The anticipated start is upon Notice to Proceed, anticipated January/February 2027.

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