DOWL led the award-winning design of Alaska’s first Diverging Diamond Interchange. The alternative interchange type was selected due to the operational benefits and reduced construction cost. Services included all preconstruction efforts to complete this jointly funded state and federal project. Major elements of the project included two new three-lane-wide, two-span bridges, 1,500 feet of 36-inch water main relocation, noise walls, landscaping, pedestrian facilities, signalization, high mast lighting, geotechnical engineering, and foundation design. Bid-ready plans were completed in August 2015, less than 30 months from when the project was initiated. Construction started spring 2016 and completed in fall 2018.
This project was awarded the Outstanding Large Project by the APWA, Alaska Chapter in 2019.
State of Alaska Department of Transportation and Public Facilities
Drainage and River Systems
Survey and Mapping
Water Supply and Wastewater