HWA was the lead geotechnical engineer for Lynnwood’s Scriber Lake Park Boardwalk Project, replacing a soft-surface trail with an 8-foot-wide, pile-supported boardwalk and a 60-foot prefabricated bridge. HWA conducted field investigations, including borings and test pin-piles, addressing up to 55 feet of soft peat. HWA provided geotechnical recommendations, coordinated with the design team, and performed construction inspection services to ensure structural and environmental compliance.

A six-foot-wide boardwalk that creates an accessible path from the upper to lower garden. Field explorations and laboratory testing were conducted and geotechnical recommendations for foundation support of the proposed boardwalk were provided. In addition, critical areas studies related to seismic, erosion, and landslide hazard areas were conducted, and this project was awarded the Washington Recreation & Parks Association (WRPA) Spotlight Award for Outdoor Spaces (population under 100,000).

HWA provided geotechnical engineering services in support of design for a new parking lot to provide access to the East Lake Sammamish Trail. HWA designed a soldier pile wall that was required since the slope exhibited marginal stability and an ADA ramp to connect the newly constructed parking lot to the trail. HWA performed engineering analyses for foundations and slope stability of the walls as well as recommendations for capturing ground water and diverting it away.