Computer Control of CSOs

by Russell W. Batzell, (M.ASCE), Black & Veatch, 1215 Eldbridge Rd., Suite 200, Chesterfield, MO 63017,

Serial Information: Civil Engineering—ASCE, 1994, Vol. 64, Issue 11, Pg. 58-59

Document Type: Feature article


Like many older cities, St. Louis has a combined sewer system and is faced with the difficulties of dealing with combined sewer overflows (CSOs). The Metropolitan St. Louis Sewer District is implementing a $120 million system that uses computers to control wastewater collection. The Overflow Regulation System (ORS), phased in over a ten year period and nearing completion at the end of 1994, integrates existing flood protection and pollution abatement facilities to prevent dry weather sewage overflows caused by high river levels. The ORS is expected to reduce sewage discharge to the Mississippi River by an average of 1,450 liters per second on an average annualized basis. Key to the system's operation is a Supervisory Control and Data Acquisition (SCADA) System that provides real-time monitoring and control of 41 pumping stations and almost 200 sluice gates in the 197 sq km Bissell Point watershed in St. Louis.

Subject Headings: Overflow | Sewage | Pumping stations | Computing in civil engineering | Combined sewers | Watersheds | Water pollution

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