SR5 and SR161 Interchange and SR18 Triangle Interchange

J.A. Brennan completed construction documents for roadside restoration and assisted with stream and wetland mitigation design. The roadside restoration design encompasses more than 27 acres, including over 20 acres of native planting along the roadside and within constructed wetlands, a stream, and critical area buffers.

Maintenance access paths within dense restoration zones allow easy access to invasive plants for eradication and to new plants for hand and truck watering. Working with a large area and a limited budget, J.A. Brennan focused on site-specifically restoring habitat and visual functions while conserving dollars.

Client: Washington State Department of Transportation
Location: Federal Way, WA