The construction of all components of the Salmon Creek Treatment Plant UV System Replacement. Work includes disassembly and modification or demolition of an existing steel canopy at the UV facility, construction of a concrete channel (Channel 2) parallel to the existing UV disinfection channel (Channel 1), installation of a UV lamp system in Channel 2 while maintaining the existing UV system in service in Channel 1. Project includes demolition and replacement of existing equipment. Work includes excavation, reinforced concrete, electrical, instrumentation and control, yard piping, paving, and construction phase stormwater management. Diving is required to accomplish the work.