Killian Creek Wastewater Treatment Plant Expansion

Ardurra designed the expandable Killian Creek WWTP, enabling Lincoln County to operate efficiently while upgrading capacity through strategic three-phase development as demand increased. The original plant infrastructure included 5,300 LF of 30-36-inch gravity sewers, duplex submersible pump station, and 7,600 LF of 12-20-inch force mains supporting comprehensive treatment processes including fine screening, grit removal, sequencing batch reactors, tertiary disk filters, and aerobic digestion systems.

Phase 1 commenced with a 1.7 MGD capacity, expanding to 3.3 MGD in 2014 through the addition of minor equipment, demonstrating design flexibility. Subsequent phases systematically increased capacity while utilizing proven treatment technologies, culminating in an ultimate capacity of 6.6 MGD by Phase 3 completion.

Key Phased Development Highlights:

• Designed original 1.7 MGD plant with strategic expansion capability reaching 3.3 MGD in Phase 1 through minor equipment additions

• Implemented Phase 2 expansion, adding SBR system upgrades, third effluent filter, second UV disinfection channel, and enhanced sludge dewatering

• Completed Phase 3 to ultimate 6.6 MGD capacity, incorporating new headworks, SBR systems, effluent filters, UV systems, and aerobic digestion infrastructure

• Engineered comprehensive treatment processes, including fine screening, grit removal, SBRs, tertiary disk filters, aerobic digesters, and rotary press dewatering

• Provided extensive infrastructure systems spanning gravity sewers, pump stations, force mains, and six specialized buildings

• Adapted phased construction approach, minimizing operational disruption while maximizing capital fund efficiency

• Partnered with Lincoln County, understanding dynamic regional service demands, enabling responsive capacity expansion

The phased approach provided Lincoln County with cost-effective wastewater treatment expansion while maintaining operational continuity. Strategic design flexibility and partnership collaboration enabled efficient capital investment supporting regional growth and environmental protection requirements.