Highway Runoff Management

Project Overview

Working with a state transportation authority, Total Stormwater Solutions designed and installed a linear green infrastructure system along a 6-mile highway corridor. The project replaced failing roadside ditches with a continuous bioswale system integrated with sediment forebays at major inlets, significantly reducing pollutant loads to adjacent waterways.

Scope of Work

• Assessment of existing drainage conditions along 6-mile corridor
• Bioswale design for 3.2 miles of roadside application
• Sediment forebay design at 12 major drainage inlets
• VDOT permit coordination and plan approval
• Native grass and wildflower seeding specification
• Construction phasing plan to minimize traffic impacts
• Establishment monitoring and corrective seeding program

Results

• 95% TSS removal efficiency in post-construction monitoring
• Eliminated chronic erosion at 8 problem locations
• Native plant establishment reduced maintenance frequency
• Template adopted by VDOT for similar corridor projects