MNOPSMinnesota Office of Pipeline Safety
Copyright 1988-2018, All rights reserved.
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Below are the seven accepted methods of installation as they are described in the MNOPS document:
Other Trenchless Sewer Service Lateral Verification Methods: With prior approval from MNOPS, other gas pipeline installation methods that demonstrate and document protection of sewer service laterals may be used.
Kelly said the MNOPS' action already has led to the decision of a gas operator that had a recent crossbore incident to video every sewer line installed by directional drilling.