Submerged Conduit Investigation Using Remote Operated Vehicles at the Stickney WRP's WS Plant
A 500-ft long 14'×14' conduit and a 4,000-ft long 18.5-ft elliptical conduit are to remain as part of the facility upgrades to MWRDGC's 720 MGD Westside (WS) Plant, part of the Stickney Water Reclamation Plant (WRP). In order to assure that these two conduits will provide reliable service for a minimum of 75 years, investigations were needed to determine their condition; however, these conduits cannot be taken out of service for inspection without taking the entire WS Plant out of service. The WS Plant may be taken out of service for no more than 72 consecutive hours for routine maintenance thus limiting the inspection of these two conduits to no more than 72 consecutive hours. The conduit inspection method chosen for these two conduits was a submersible Remote Operated Vehicle (ROV) equipped with a dual imaging sonar system and a video camera to search conduits for cracks, spalls, and other structural anomalies as well as any sediment or debris build up. The sonar systems ability to detect anomalies in advance allowed the inspection to progress faster than otherwise possible and thus complete the inspection within the required 72 hours timeframe.
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Document Type: Research Article
Publication date: 2011-01-01
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