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MVN-2018-01066-CO

Published April 13, 2020

Expiration date: 5/30/2020

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NAME OF APPLICANT: Methanex USA, LLC, c/o CK Associates 8591 United Plaza Boulevard, Suite 300, Baton Rouge, Louisiana 70809.

LOCATION OF WORK: Within the Lake Pontchartrain Basin, in the Lake Maurepas Hydrologic Unit (HUC 08070204); located adjacent to and southwest of Louisiana Highway 30, approximately 0.7 mile northwest of its intersection with Louisiana Highway 73, near Geismar, LA, in Ascension Parish.

CHARACTER OF WORK: The applicant has requested authorization to clear, grade a tract, and install and maintain culverts and fill to construct a 2-mile private access road with rip-rap lined ditches from LA-30 to LA-75. The purpose of the road is to alleviate congestion along LA-73 during peak activity periods associated with facility operations, current and future capital expansion projects, and turnarounds, while providing direct access to LA-30 and LA-75 for both, Methanex and Huntsman International, LLC. Approximately 2,737.7 cubic yards of asphalt, 5,479.1 cubic yards of limestone, 4,576.9 cubic yards of clay, and 100 cubic yards of rip-rap will be placed in jurisdictional wetlands and waters. Approximately 5.1 acres of emergent wetlands, 2.9 acres of forested wetlands, and 0.06 acre of jurisdictional waters will be impacted by the proposed project. As compensation for unavoidable wetland impacts the applicant proposes to purchase wetland credits from a Corps approved mitigation bank located in the watershed.

To minimize wetland impacts, the applicant has designed the project such that the road will be co-located within an existing utility corridor along the entirety of the route. Methanex has obtained permission from Entergy to construct the road within a portion of the existing maintained overhead utility right-of-way. The existing right-of-way is maintained free of woody vegetation and allows Methanex to minimize impacts to forested wetlands along the proposed route by using existing, disturbed areas with low-quality, emergent wetlands to the greatest extent possible. According to the application, the roadway width has been minimized to the maximum extent practicable with regard to purpose and need for the project. The proposed road alignment is also designed to maximize use of non-wetland areas based on the wetland delineation results. As such, no additional construction access or equipment staging areas are proposed for the project, thus, reducing the loss of wetland function through elimination of temporary matting and laydown areas.