MVP proposal for trenchless stream crossings lacks critical technical planning

Mountain Valley Pipeline, LLC’s (MVP) proposal to bore underneath 126 stream crossings has major technical deficiencies and omissions. This lack of detail makes it impossible for regulatory agencies and the public to complete a thorough evaluation of engineering processes and assure the feasibility of the approach. In this report, we outline the deficiencies in MVP’s dewatering analysis, geotechnical analysis, consideration of impacts to riparian and wetland zones, and consideration of impacts to endangered species. We recommend that MVP be required to submit a full environmental impacts analysis in the form of a Supplemental Environmental Impact Statement that describes their proposed trenchless crossing methods in greater detail.