FERC said Friday it will finish the final environmental impact statement (FEIS) for the proposed Atlantic Coast Pipeline (ACP) about three weeks later than originally expected, with the document now scheduled for release July 21.

ACP, a joint venture backed by Dominion Resources, Duke Energy and Southern Company Gas, received its draft EIS from the Federal Energy Regulatory Commission late last year [CP15-554].

The roughly 600-mile, 1.5 Bcf/d pipeline would start in West Virginia and travel Virginia and North Carolina, delivering Marcellus and Utica shale gas to serve power and heating demand in the Southeast and Mid-Atlantic.

Prior to Friday’s notice of revised schedule, FERC had planned to release the final EIS June 30. The new 90-day federal authorization deadline for the project is Oct. 19.

FERC said it needs the additional time to review supplemental information the developers submitted last month in response to an environmental information request from the agency.

The three-week delay may not have much impact on the pipeline’s schedule, with the Trump administration only this week officially announcing two new appointees to restore FERC’s quorum so it can resume acting on pipeline certificate orders. The Senate confirmation process for those nominees could take months.

Originally scheduled to enter service in 4Q2018, ACP’s start-up date had to be pushed back to 2019 after the U.S. Forest Service took issue with the pipeline’s original route through the George Washington and Monongahela national forests.

FERC’s notice Friday also affects Dominion Transmission Inc.’s Supply Header Project, which is designed to feed supply to ACP’s start point in Harrison County, WV.