Cedar Rapids Ionwave #3318551-01 Addendum 2

8th Avenue cable-stayed bridge replacement, floodwalls, and associated infrastructure

The City of Cedar Rapids is seeking a contractor for a major bridge replacement and flood-control project over the Cedar River. - Government buyer: City of Cedar Rapids, Public Works Department, Engineering Department; Cedar Rapids, Linn County, Iowa. - Scope: Demolish the existing 8th Avenue Bridge and construct a new cable-stayed bridge and flood-control system, with approach roads, traffic improvements, sidewalks and shared-use trails, utility reconstruction, lighting, and related civil work. - Estimated project cost: $123 million. Completion is required within 1,250 calendar days after Notice to Proceed; no option years or subscription are indicated. - Named companies and products: Landscape Forms is identified with a black Scarborough bench (2); Stanley Consultants prepared the MSE-wall stability analysis. No bridge, structural-steel, or other major construction OEM is specified. The bid documents also identify CRANDIC, Ingredion, and Mott and Chelsea Buildings as nearby monitoring locations or properties, not suppliers. - Notable technical and material requirements: Apply Iowa DOT specifications and Buy America/BABA requirements to permanent materials; monitor noise and vibration during pile installation; meet MSE-wall stability design criteria, including a 250-psf surcharge, 75-year service life, and minimum 4-foot embedment. The test-pile report notes that noise and vibration exceeded human-disruption limits at the Courthouse, although measured vibration remained below structural-damage thresholds. - Demolition and salvage: Salvage 600 feet of bridge railing for public distribution, 40 feet of railing and posts for public art, and at least 16 feet of variable-depth steel girder. Lead was detected in the existing bridge paint, requiring applicable removal controls and protection of the public, utilities, and nearby structures. - Major specified items: The bid schedule includes 3,881,842 units of structural steel (2408-7800000), 1,595,012 of epoxy-coated reinforcing steel (2404-7775005), 4,103 of structural bridge concrete (2403-0100010), 2,940 micropiles (0000-ZB-CR), 4,469 of sheet pile (0000-ZA-CR), and a stay-cable system (SP-020, quantity 1). It also specifies 96 bridge deck panels (SP-017), 96 bike-path deck panels (SP-019), and the test-pile items listed below. - Other named organizations: Stanley Consultants is the engineering consultant named in the MSE-wall analysis; Landscape Forms is the manufacturer named for the bench. No general contractor or bridge-system OEM is identified.

Description

The project involves demolishing the existing bridge and constructing a new cable-stayed bridge crossing the Cedar River, with integral flood-control system components. Work also includes approach roadways, traffic improvements, sidewalks, trail reconstruction, utility reconstruction, and lighting. The project is located in Cedar Rapids, from 1st Street SW to 3rd Street SE along 8th Avenue SE/SW and Diagonal Drive SW. Final completion is required within 1,250 calendar days, and the stated engineer’s opinion of probable cost is $123,000,000.

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