Naghten Street Stormwater & Roadway Improvements

Overview

The City of Columbus, Ohio, selected Ribway as the prime consultant to provide professional engineering services for the separation of the storm and sanitary sewer system and the rehabilitation of a major roadway in a heavily congested downtown area. This project aimed to reduce infiltration and inflow into the sanitary sewer system while reconstructing the aging roadway infrastructure. The project was divided into two parts:

• Part 1: Rehabilitation of two large combined brick sewers in significant need of repair.
• Part 2: Storm drainage and roadway improvements.

Project Scope

Storm Drainage Improvements (Part 2):

• Installation of over 50 curb inlets and catch basins.
• Construction of approximately 2,300 linear feet of 54- and 60-inch storm sewers along Naghten Street, Cleveland Avenue, and Grant Avenue.
• Installation of over 1,000 linear feet of 12- to 15-inch storm laterals.

Roadway Improvements (Part 2):

• Partial and full-depth pavement replacement for a ½-mile section of Naghten Street and Grant Avenue.
• Construction of new sidewalks, curbs, and gutters.
• Replacement of residential and commercial driveways.
• Numerous utility and service relocations.
• Installation of ADA-compliant accessibility curb ramps.

Services Provided

Ribway’s scope of services for Part 2 included:

• Field Survey: Mapping and assessing existing site conditions.
• Geotechnical Investigations: Subsurface evaluations for pavement and utility design.
• Hydrologic and Hydraulic Analyses: Ensuring proper stormwater management.
• Design Report: Summarizing findings and proposed solutions.
• Contract Documents: Preparing detailed plans and specifications for construction, including provisions for pedestrian pathways, signage, striping, erosion control, and traffic maintenance (utilizing part-width construction and road closures with detours).
• Construction Engineering Services: Providing support during the construction phase to ensure compliance with design specifications.

Challenges

The project presented several significant challenges:

• Utility Relocations: Coordination with multiple utility providers for relocating services.
• Traffic Maintenance: Managing traffic flow in a heavily congested downtown area.
• Right-of-Way Constraints: Designing improvements within the narrow existing right-of-way.
• Easement Acquisition: Securing necessary easements for construction activities.

Timeline

• Design Completion (Part 2): June 2009.
• Construction Completion (Part 2): June 2011.

Results

The Naghten Street Stormwater & Roadway Improvements project successfully addressed the City of Columbus’ goals of reducing infiltration and inflow into the sanitary sewer system and enhancing the roadway infrastructure. The project delivered a safer and more efficient roadway system, improved stormwater management, and modernized pedestrian access.