Dozens of people gathered outside of a National Park Service office in Maryland in a push to stop construction of a pipeline under the Potomac River.

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Columbia Gas Transmission is asking federal regulators for permission to start building a natural gas pipeline that would run through part of western Maryland and cross under the Potomac River near Hancock.

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Maryland environmental regulators are holding a hearing on whether to award a permit for a pipeline that would carry natural gas under the Potomac River.

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HANCOCK — A Potomac River protection group is organizing a demonstration against plans for a pipeline beneath the river that would carry natural gas from Pennsylvania to West Virginia. Brent Walls of the Potomac Riverkeeper Network says demonstrators plan a ...

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