Engineers Estimate: $31 million
Construction Value: $27.3 million
Length: 2.9 lane-miles
Owner: City of Seattle
Primary Design: Perteet, Inc.
Design Support: HNTB
Contractor: Gary Merlino Construction Company
Functional Class: Arterial
Greenroads Version: v1.5
The 23rd Ave Corridor Improvements Project is a three-phase reconstruction of a critical arterial in the Central District and adjacent neighborhoods of Seattle, WA. The existing roadway consisted of four narrow lanes over much of the corridor contributing to frequent collisions and delays from left turns. The improvement Project consists of replacing the existing failing pavement and restriping to create a single lane in each direction with a center turn lane. The conversion is accompanied by upgraded utilities, new sidewalks, extensive landscaping, upgraded lighting, and bus pullouts and new stop amenities, resulting in a safer roadway accessible to all users.
Sustainable features of the Project focus on increasing multimodal access along the corridor while improving safety. A number of responsible design and construction practices were implemented to reduce environmental impacts as well as lifecycle costs. Project highlights include: