Collection System Inspection and Rehabilitation Program

by Bill Macaitis, Metropolitan Water Reclamation, District of Greater Chicago, Chicago, United States,
Amreek Paintal, Metropolitan Water Reclamation, District of Greater Chicago, Chicago, United States,



Document Type: Proceeding Paper

Part of: Water Management in the '90s: A Time for Innovation

Abstract: The Metropolitan Water Reclamation District of Greater Chicago is a regional wastewater and water resources agency responsible for serving an area of about 875 square miles. Recently the District developed a program for the inspection and preventive maintenance of its 535-mile collection sewer system to increase the reliability of the aging system and to reduce the incidents of cave-ins. The purpose of the inspection program is to determine maintenance and rehabilitation needs, and consists of the physical inspection of manholes and sewer routes, television inspection of the inside of the sewer, infrared or ground piercing radar inspection for locating adjacent cavities, and flow monitoring. Inspection data are analyzed using an computer-aided mapping and data system. Based on the analysis of inspection data, the preventive maintenance and rehabilitation needs are developed and prioritized. The program is coordinated through an Underground Advisory Committee consisting of expert personnel from the design and maintenance departments of the District.

Subject Headings: Inspection | Water reclamation | Rehabilitation | Water resources | Maintenance | Sewers | North America | Illinois | United States | Chicago

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