The Supreme Court on Monday suggested it was unlikely to block a planned natural-gas pipeline from running under a section of a major East Coast hiking trail. At issue is the planned Atlantic Coast Pipeline, which would transport natural gas from West Virginia across 600 miles to sites in Virginia and North Carolina. The project, a partnership in which Dominion Energy Inc. and Duke Energy Corp. are major investors, is designed to reach East Coast markets and respond to demand for cleaner-burning fuel. The price…