21312 30th Drive SE, Suite 110, Bothell, WA 98021 | 425.774.0106                                  © 2016 HWA GeoSciences, Inc.

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Twanoh State Park

HWA provided geotechnical services for the design of a new sewer system for Twanoh State Park. The work included a new collection system throughout the park, a new pump station and force main to transport sewage to the new septic tanks. Our work included assessing the application rate of the existing drain field. Borings and test pits were performed to characterize soil and ground water conditions in the park.