Big Run South Sanitary Sewer Subtrunk Extension

Project Overview

Ribway served as the prime consultant for the extension of a 30-inch diameter sewer along Big Run South Road from Alkire Road to I-270. This project included design and construction administration to accommodate significant engineering and logistical challenges.

Key Responsibilities

Study Phase:

• Defined the tributary area and calculated design flows.
• Sized the sewer and evaluated alternate alignments.
• Delivered a comprehensive design report summarizing findings and recommendations.

Design Phase:

• Prepared detailed plans and specifications
• Coordinated subsurface investigations and surveys.
• Prepared approximately 30 easement plats and legal descriptions.
• Prepared maintenance of traffic plans and coordinated with Franklin County and ODOT.

Construction Administration:

• Attended preconstruction conference and reviewed shop drawings.
• Responded to contractor inquiries and provided clarifications.

Challenges and Solutions

• Tunnel Installation: Successfully designed and monitored the installation of a 425-foot-long, 60-inch tunnel beneath the I-270 Limited Access Highway and depths of sewer averaging approximately 22 feet.
• Roadway Reconstruction: Reconstructed sections of Big Run South Road, including 2,000 feet of shoulder, ditches, and culvert improvements.

Timeline

• Design Completion: June 2004
• Construction Completion: April 2005

Project Outcomes

The Big Run South Road Sewer Extension successfully addressed the area’s sanitary sewer needs, overcoming significant design and construction challenges. Ribway’s expertise in alignment evaluation, tunneling, and coordination with local agencies ensured the successful completion of this complex project.