THE SE 172ND AVENUE IMPROVEMENTS PROJECT IS COMPLETE!

The 172nd Avenue project was completed in Fall of 2010. This project added travel lanes, bike lanes and sidewalks, and extended 172nd Avenue south to a new signalized intersection at Highway 212 at Anderegg Parkway. The project eliminated the two currently troublesome intersections of Highway 212 and Armstrong Circle, and provided a new storm drainage system, sanitary sewer and water line. Clackamas County and the City of Happy Valley are sharing the $30 million cost of the project.

Several intersections were significantly improved with the project, including:

• New traffic signal at Highway 212/172nd Avenue/Anderegg Parkway
• Traffic signal at Rock Creek Boulevard (a major new east/west roadway being constructed west of 172nd Avenue)
• A two-lane roundabout at the intersection in the middle of the corridor.

A number of sustainability/“green streets” elements are incorporated in the project, including:

• Retrofitting an existing culvert with a fish-friendly culvert
• Using a “green street” model, with native landscaping on the edge of the roadway to filter and hold stormwater
• Recycling portions of homes that had to be demolished for the project, and deconstructing two additional homes so that the materials can be re-used
• Installing “perpetual asphalt” so that future maintenance can be done more cost-effectively and sustainably by removing the top two inches of pavement, adding more oil and returning the asphalt to the roadway.

PROJECT TEAM MANAGERS

• Terry Mungenast, Clackamas County Department of Transportation, Project Manager
• Dan Houf, P.E., Harper Houf Peterson Righellis Inc., Consultant Team Project Manager
• Neil Waibel, P.E., Harper Houf Peterson Righellis Inc., Project Engineer/Construction Engineer

CONSULTANT TEAM

• DKS Associates, Inc.
• Hanna, McEldowney and Associates
• Pavement Services, Inc.
• Mason Bruce Girard, Inc.