Confederated Tribes of the Chehalis Reservation, Wastewater Collection System & Wastewater Treatment Facility Improvements
Century West managed sewer improvements for the Chehalis Tribes, which included installing a new septic tank effluent collection system for 21 homes and 5 tribal buildings using over 8,300 linear feet of PVC pipe and two, 100 gallon-per-minute pump stations. Century West also evaluated the existing treatment plant. The membrane system was deemed capable of treating flows for the next 20 years without requiring expansion. Thus, the team proposed enhancements, including new pump stations, piping, electrical controls, and various facility upgrades.