Cedar Rapids Ionwave #3318551-01 Addendum 5

Cedar Rapids 8th Avenue Bridge Replacement and Cedar River Floodwalls

The City of Cedar Rapids is seeking bids for a major 8th Avenue Bridge replacement and Cedar River flood-control construction project. - Government buyer: City of Cedar Rapids, Engineering, with the Public Works Department issuing project documents. - Scope: Demolish the existing bridge and build a new cable-stayed bridge with integral flood-control features, Cedar River floodwalls, approach roadways, traffic improvements, sidewalks, trail reconstruction, utility work, lighting, and mechanically stabilized earth (MSE) walls. - Key requested items and quantities: - Stay Cable System, part SP-020: 1 lump-sum system, including HDPE sheathing and an integral passive ice-management profile. - Demonstration Shaft, part 2433-0003000: 65 LF. - Steel HP 14 x 73 piles, part 2501-0201473: 17,080 LF for the project; separate test-pile report identifies 4 HP 14x73 piles, each 50 feet long. - PZC-26 sheet piles: 2 test piles, each 50 feet long. - Modified 6-inch subbase, part 2010-J: 15,221 SY; shared-use path PCC, part 7030-C: 1,471 SY; sidewalk PCC, part 7030-E: 3,526 SY; sod, part 9020-A: 15,558 SY. - 12-inch filter sock installation, part 9040-D-1: 12,981 LF; filter sock removal, part 9040-D-2: 12,981 LF; light-pole removal, part 2401-6745765: 12 each. - Notable requirements: The stay-cable system must retain its passive ice-management profile. The contractor must provide compliance and manufacturing documentation, and the City will seek project-specific FHWA concurrence on the system’s Buy America classification and manufacturing plan. No corrosion-protection coating is required for the stay cables. - Salvage and site requirements: Salvage 600 feet of existing 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; applicable removal provisions and protections for the public, utilities, and structures apply. - Related engineering and monitoring information: The attachments include test-pile vibration and noise monitoring findings and an MSE-wall slope-stability assessment by Stanley Consultants. The MSE criteria include a 250-psf surcharge, a 75-year service life, and at least 4 feet of embedment; Wall 7 requires longer-than-typical reinforcement and ground improvements. - Named firms: No OEM is specified for the requested construction or stay-cable system. Prospective plan holders—not awardees—include Absolute Group; ace concrete cutting; Acme Electric Company; Advanced Traffic Control, Inc.; American Excavation and Concrete; Ames Construction, Inc.; Armorock; Axiom Consultants; Bill Miller Logging, Inc.; Bi-State Masonry, Inc.; Bix Fabrication; Bolton & Menk; Boomerang Corp; Boulder Contracting, LLC.; Brandt Construction Co; Burch Gehrig Inc; BWC Excavating, LC; C.J. MOYNA & SONS, LLC.; Carboline Global; and Carl Bolander & Sons LLC. Stanley Consultants is also named as the author of the MSE-wall assessment. - Estimated value and performance: Estimated project cost is $123 million. Final completion is required within 1,250 calendar days after the Notice to Proceed; no option years or annual subscription are identified.

Description

The project generally includes demolition of the existing bridge and construction of a new cable-stayed bridge crossing with integral flood-control 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. The engineer’s opinion of probable cost is $123,000,000, and final completion is specified as 1,250 calendar days.

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