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Corps seeks public comment on Draft Environmental Assessment on Line 84 Pipeline Remediation Project

Published May 13, 2019

Williston, ND A draft environmental assessment (EA) for the proposed rehabilitation of a segment of an 8-inch diameter steel crude oil pipeline, Line 84, owned and operated by the North Dakota Pipeline Company LLC (NDPL), near the City of Trenton in Williams County, North Dakota is currently available for public review.

Line 84 was installed in 1984, via trenching, along a slope of the Missouri River Valley floodplain. Two active landslides have been observed along an unnamed slope adjacent to NDPL’s existing Line 84 pipeline with evidence of movement transitioning onto the right-of-way and intersecting Line 84, which has the potential to create a geological hazard (geohazard). The proposed project would replace the existing Line 84 where an active landslide has been observed with a new section of 8-inch diameter steel pipeline, installed using the horizontal direction drill (HDD) construction method to mitigate future potential geohazard. The HDD would be approximately 1,330 feet long and the depth would average 45 feet below ground surface. The proposed project would require crossing Corps-managed land; therefore, a Section 408 permit and real estate easement are required.

This draft EA is consistent with the National Environmental Policy Act of 1969 (NEPA), as amended, the Council on Environmental Quality’s (CEQ) regulations for implementing NEPA (40 CFR 1500-1508), the Corps’ regulations for implementing NEPA (33 CFR 325 and Engineering Regulation 200-2-2) and other applicable environmental laws and regulations. 

This assessment is being completed in accordance with the CEQ regulations in Section 1506.5(a) and 1506.5(b), which allows an applicant to prepare an EA for a federal action. The Corps has independently evaluated and verified the information and analysis in this EA and takes full responsibility for the scope and content contained herein.

The public is encouraged to provide comments on the draft environmental assessment. The draft supplemental environmental assessment is available for viewing at: https://www.nwo.usace.army.mil/Missions/Civil-Works/Planning/Project-Reports/. Comments can be mailed to: U.S. Army Corps of Engineers, Omaha District; CENWO-PMA-C; ATTN: NDPL Draft EA; 1616 Capitol Avenue; Omaha, NE 68102-4901. Comments can also be emailed to: cenwo-planning@usace.army.mil. Comments must be postmarked or received no later than June 14, 2019.

Omaha District Public Affairs Office

Release no. 19-070