Construction to the 1MGD Big Lake WWTP in Mount Vernon, Wa. included: Rehabilitation of Lift Station No. 1 (WWTP influent lift station), installation of electrical and communications conduit between it and the WWTP, upgrade the WWTP including a new headworks building, two anoxic basins, two aeration basins, a membrane building and associated membrane basins, a blower/electrical building, process piping and demolition of existing clarifiers and rotating biological contactors. Installation of a stormwater system; modification to the existing headworks facility at the digester; and revising the influent structures and piping. The project required ensuring that plant operations were not disturbed for the duration of the project, the implementation of erosion and sedimentation control measures, and restoration of disturbed surfaces. Also included in the project was installation of new surfacing and upgrading telemetry panels at seven remote lift stations.