Atlantic Coast Pipeline Critical Zone Mapping System

New from Dominion Pipeline Monitoring Coalition!

The DPMC has published an interactive Critical Zone Mapping System (CZMS) in support of citizen efforts to overcome the continuing failure of the regulatory system.

The CZMS provides a framework for evaluation of the risk associated with construction of the ACP and the limitations of the proposed or available control measures. The CZMS includes user-selectable map layers that display a number of key factors that should be considered during project review and prior to project approval. Among these are layers that indicate slope steepness, soil erodibility, high-excavation areas, stream crossings, surficial karst, and existing dye traces in karst systems.

One of the more-critical map layers identifies those sections of the pipeline corridor and access road system that meet Dominion’s criteria for application of its so-called “Best in Class” program. These areas, where the existing ground slope is 30% or more for distances of 100 feet or more, present a high risk to downslope water resources due to erosion, slope destabilization, and runoff alteration.

Although Dominion has posted what it describes as detailed erosion and runoff control plans, the plans do not include “Best in Class” measures. With limited exceptions, the actual site-specific details for application of the “Best in Class” program have not been provided for regulatory agency and public review, and apparently they will not be provided until after project approval.

These high-risk “Best in Class” areas represent almost half the length of the proposed ACP pipeline corridor and access road system in the mountainous counties of Virginia and West Virginia.

Among the more-extreme of the “Best in Class” measures is the use of heavy steel wire mesh to hold steep mountainsides in place after pipeline construction. Click here for a larger version of this image.

For more information see: The ACP Critical Zone Mapping System