City of Columbia Ionwave #90/2026 Addendum 1

Bridge 9 MKT Trail demolition and prefabricated pedestrian bridge replacement

The City of Columbia is seeking a contractor to demolish and replace Bridge 9 on the MKT Trail over Flat Branch Creek in Missouri. - Buyer: City of Columbia, Missouri — Finance/Purchasing Division (also identified as the Purchasing Division), for the Parks and Recreation Department. - Scope: Replace the existing bridge with a 105-foot-long, 11-foot-clear-width, single-span prefabricated steel truss pedestrian bridge on concrete abutments. Work includes approaches, foundations, earthwork, trail surfacing, erosion controls, signs, and related construction. - Bridge manufacturer: Pioneer Bridge is expressly accepted as an alternate manufacturer. The bridge manufacturer and installer must each have at least five years of relevant experience. Horizontal safety-rail pickets must be on the outside of the truss. - Other named organizations: American Document Solutions (ADS) is identified as a source for plan documents; Terracon prepared the geotechnical report for McClure Engineering Co. The procurement also references MoDOT specifications. Parks and Recreation will handle tree removal; the contractor must haul away waste. - Major listed materials and quantities: One prefabricated structural steel bridge; 320 HP 10X42 structural steel piles; 10 pile-point reinforcements; 19.8 Class B-2 concrete; 126 slab on prefabricated steel bridge; 113 Type 5 aggregate base course; 113 MKT Trail surface mix; 33.8 bridge approach slab; 241 Type 2 rock blanket; 371 geotextile fabric; 38 embankment in place; 50 silt fence; 4 Type III moveable barricades; 11 construction signs; and 0.1 seeding. Units are not specified in the provided summaries. - Other construction work: Demolition and removal of the existing bridge and improvements, clearing and grubbing of approximately 0.1 acres, mobilization, contractor surveying and staking, and 52 excavation for structure (unit not specified). - Geotechnical considerations: The report recommends deep foundations using driven steel H-piles or drilled shafts extending into bedrock. A shallow foundation may be suitable at the Bridge 9 abutment near Boring B-1 if it bears on competent bedrock and includes scour protection. The report also addresses earthwork, groundwater, drainage, and construction monitoring. - Schedule and warranty: The source documents conflict on the completion period: the solicitation/addendum states 120 calendar days after Notice to Proceed, while another attachment states 180 calendar days. Confirm the controlling requirement with the City. A sample agreement also provides for one year of responsibility for repairs or replacement due to defects after Final Acceptance. - Value: No contract value is provided; the value shown below is an estimate for planning purposes.

Description

The City of Columbia is seeking bids for replacement of Bridge 9 on the MKT Trail. The work is for the Parks and Recreation Department and is supported by plans, technical specifications, and a geotechnical engineering report included with the bid documents. Addendum 1 revises certain plans and job provisions, extends the deadline for written clarification requests, and sets the anticipated earliest onsite construction start date as November 29, 2027, with completion by March 27, 2028. Parks and Recreation will handle tree removal; the contractor is responsible for hauling away waste.

View original listing