Four 30-hp rotors circulate effluent through two 75,000 c.f. oxidation ditches

Horner & Shifrin initially prepared a facilities plan for improvements to the City of Bonne Terre’s wastewater system. The firm subsequently prepared construction plans and specifications for numerous improvements to meet both the needs of the City and a new 3,000-inmate correctional center located east of Bonne Terre.

Those improvements included significant modifications to the City’s existing treatment plant, as well as approximately 17,000 linear feet of 8 to 12 inch interceptor sewers, 28,000 linear feet of 6 to 14 inch force mains, and five new pumping stations ranging in capacity from 50 gpm to 1,800 gpm.

Horner & Shifrin also designed a new 900,000 gallon per day wastewater treatment facility to serve the new Missouri Department of Corrections Eastern Reception, Diagnostic and Correctional Center. This new Northeast Wastewater Treatment Facility is located just north of the new correctional facility.

The facility was completed in 2001 and includes the following major unit processes:

System includes two 45 ft. diameter final clarifiers with a sidewater depth of 12 ft.

Two Parshall flumes for flow measurement
Wastewater screening and grinding equipment,
with a coarse and fine screen backup
Grit removal unit and a grit screw conveyor housed inside a building
Two oxidation ditches, each with a volume of 75,000 cubic feet and each equipped with four 30 horsepower rotors
Flow splitting structure
Two 45 foot diameter final clarifiers with a sidewater depth of 12 feet
Sludge pump station for pumping return and waste activated sludge
Open channel ultraviolet light disinfection unit
Administration and control building
Emergency standby generator
Two 900,000 gallon capacity sludge lagoons

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