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The Wooten Company has provided engineering services to the City of Clinton for its wastewater treatment system through three plant upgrades. In 1962, the City constructed a 1.3 mgd conventional trickling filter type secondary wastewater treatment plant with anaerobic digesters and sludge drying beds. This plant was upgraded in 1977 to include two stage high purity activated sludge system and tertiary filtration to meet more stringent effluent limits. In 1991, Wooten recommended upgrading and expanding the wastewater treatment plant to 5.0 mgd to accommodate future residential (14,800 person), commercial, and industrial growth. The major design objectives in upgrading and expansion of the plant were to maximize use of the existing facilities, provide new facilities with more flexibility in plant operation and future nutrient removal requirements, provide consistent compliance with the effluent limitations (BOD5= 5 mg/L; NH3-N=1.0 mg/L; TSS=30 mg/L and Fecal Coliform=200/100mL) and comply with the EPA 503 sludge regulations, particularly sludge management programs that considers beneficial use of sludge. In November 1992, plans and specifications for construction of the recommended upgrading and expansion of the treatment plant were prepared and contracts were awarded in April 1993. In 1995 construction was completed. The plant is controlled and monitored with a distribution SCADA system.