Project Description

PIC-CR22-6.95 Scioto Darby Road over Big Darby Creek

Submitted by the XXXX Section

Construction Cost $3,990,000
Project Location Pickaway County, Ohio
Project Owner Pickaway County Engineer
Project Designer Korda Nemeth Engineering
Contractor Eagle Bridge Company
Completion Date May 2017

Project Entry Form

Project Narrative

Plan Sheets

Project Description

The structure carrying Scioto-Darby Road (County Road 22) over Big Darby Creek in Pickaway County, Ohio, known locally as the “Gantz Bridge”, was over 100 years old when the County Engineer initiated a project to replace it. The two-span, 255 foot long truss bridge was structurally deficient and functionally obsolete. The bridge’s location over Big Darby Creek – a highly protected State and National Scenic River – required diligence in project development to achieve the County’s goal of a cost effective, low maintenance replacement structure while meeting the complex environmental and permit requirements. The new 362 foot long, 3-span bridge with 0.53 miles of realigned roadway did just that.

A fundamental goal of the project was engrained into every project consideration: providing a cost-effective, low-maintenance project. Utilizing concrete I-beams reduced costs by 15% over the lifespan of the project. Utilization of the old right of way as environmental mitigation reduced new right of way acquisition and off-site mitigation costs. Avoiding extra-ordinary structure types and sizes minimized design and construction costs, and avoids specialized maintenance and inspection requirements that would be outside the capability of County forces. The awarded construction bid was $4,079,000, within 3% of the early preliminary engineering cost estimates, and 8% below the advertised estimate. Final construction costs came to $3,990,000.

Project Features

  • Numerous design, environmental, and construction complexities
  •  Concrete I-beams were selected over steel girders
  •  Reduced maintenance and 15% lower life-cycle costs
  • Complex Environmental coordination with multiple agencies
  • Reduced environmental impacts despite new alignment of project
  • Expedited design and construction
  • Increased safety to commercial and agricultural users
  • Aesthetic bridge features incorporated