Cedar Rapids Ionwave #3318551-01 Addendum 8

Cedar Rapids 8th Avenue Bridge Replacement and Cedar River Flood-Control Construction

The City of Cedar Rapids Public Works Department is seeking bids for a major bridge replacement and flood-control construction project over the Cedar River. - Buyer and project: City of Cedar Rapids, Iowa, Public Works Department; 8th Avenue Bridge Replacement and Floodwalls at Cedar River. - Scope: Demolish the existing bridge and build a new cable-stayed bridge with flood-control components, approach roadways, traffic improvements, sidewalks, trail reconstruction, utility work, lighting, mechanically stabilized earth (MSE) walls, and related construction. - Key materials and bid items: Subbase Modified 6-inch, 15,221 SY (2010-J); Shared Use Path PCC 8-inch Class C Mix, 1,471 SY (7030-C); Sidewalk PCC 6-inch Class C Mix, 3,526 SY (7030-E); Sod, 15,558 SY (9020-A); Filter Sock 12-inch, 12,981 LF (9040-D-1), and Filter Sock Removal, 12,981 LF (9040-D-2); Removal of Light Poles, 12 each (2401-6745765); Demonstration Shaft, 65 LF (2433-0003000); Steel HP 14 x 73 Piles, 17,080 LF (2501-0201473); and one complete Stay Cable System (SP-020). - Test-pile items documented: Four HP 14x73 H-piles and two PZC-26 sheet piles, each 50 feet long, were used for the test-pile program. - Stay-cable requirements: The complete system must include HDPE sheathing and the integral passive ice-management profile. The procurement requires Buy America compliance and written FHWA concurrence on the proposed classification and manufacturing plan before materials relying on that classification are incorporated. No corrosion-protection coating is required. - Other notable requirements: The contractor is responsible for vibration monitoring. Test-pile monitoring found vibration below structural-damage thresholds, although noise and vibration exceeded human-disruption limits at the Courthouse; continued construction monitoring is recommended. Demolition requires appropriate handling of lead-containing bridge paint, protection of the public, utilities, and nearby structures, and salvage of 600 feet of railing for public distribution, 40 feet of railing and posts for public art, and at least a 16-foot steel-girder section. - MSE wall criteria: The engineering analysis covers seven walls and identifies coordination needs for reinforcement and foundation improvements. Stated 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 improvements. - Named organizations: Stanley Consultants, Terracon, and TY Lin International are mentioned in engineering or project-document contexts, not identified as requested product vendors. No product OEM is specified. - Estimated probable project cost: Approximately $123 million. - Performance period: Work is anticipated to begin after Notice to Proceed and must reach final completion within 1,250 calendar days; no option years are stated.

Description

The City of Cedar Rapids is seeking bids for demolition of the existing bridge and construction of a new cable-stayed bridge crossing with integral flood-control system components. Work also includes approach roadways, traffic improvements, sidewalks, trail reconstruction, utility reconstruction, and lighting. The project extends from 1st Street SW to 3rd Street SE along 8th Avenue SE/SW and Diagonal Drive SW in Cedar Rapids. The source lists an engineer’s estimated probable cost of $123,000,000 and final completion within 1,250 calendar days.

View original listing