DEA was the lead consultant on this $170 million project to widen I-5 from four to a minimum of six through-lanes from Mellen Street to Grand Mound in Lewis County, Washington.
I-90 Snoqualmie Pass East was a multi-year project that WSDOT undertook to improve the state’s critical transportation link across the Cascades. DEA prepared a limited scope supplemental environmental impact statement for the project.
The SR 520 Eastside Transit and HOV project was a three-mile-long roadway improvement project designed to reduce transit and high occupancy vehicle (HOV) travel times. DEA led portions of the roadway, structures, and drainage design, and also provided survey, traffic control design, and utility design services.
Threemile Canyon Farms is a family-owned, 93,000 acre food and dairy farm on the Columbia River near Boardman, Oregon. For close to two decades DEA has managed a diversity of environmental regulatory compliance efforts for the Farm.
The Tualatin Basin Water Supply Project (TBWSP) is an investment in the health and sustainability of the region’s watershed, economy and community. DEA worked with Clean Water Services and the Water Supply Partners to provide environmental planning and permitting assistance for the TBWSP.