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I-90 Snoqualmie Pass East NEPA Supplemental EIS

I-90 Snoqualmie Pass East NEPA Supplemental EIS

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.

SR 520 Eastside Transit and HOV Fish Passage Improvements

SR 520 Eastside Transit and HOV Fish Passage Improvements

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.