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MVN-2013-1616-CO

Published Jan. 13, 2014

Expiration date: 2/2/2014

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NAME OF APPLICANT: Praxair, Inc. c/o Ecology and Environment, Inc., 2900 Westfork Drive, Suite 401, Baton Rouge, Louisiana 70827.

LOCATION OF WORK: Within the Lake Pontchartrain Basin, in the Lake Maurepas hydrologic unit (HUC 08070204); Sections 90, 62, & 26, Township 11 south, Range 6 east; beginning at Praxair’s 12-inch H₂ pipeline side tap valve 3 (30.09592°N, 90.60814°W) and transverses south, paralleling existing utility corridors, crossing US Highway 61 and Kansas City Southern Railroad, and ending at Marathon Garyville Refinery (30.07103°N, 90.60033°W), near Garyville, Louisiana, in St. John the Baptist Parish, as shown on the enclosed drawings.

CHARACTER OF WORK: The applicant proposes to install and maintain two miles of

8-inch H₂lateral pipeline to allow for expansion of its South Louisiana pipeline system.

The pipeline will be installed within a 70-foot temporary right-of-way (ROW) using a combination of conventional lay, push-pull, and horizontal directional drill (HDD) methods. After construction, the ROW will be reduced to a 10-foot maintained ROW. Four access roads are proposed for use during construction of the project. Three of these roads are existing roads, two of which will require temporary board mats and corridor widening. One new 48’ wide road will be constructed between US Highway 61 and mile 1.4 of the proposed pipeline. Temporary wetland impacts include the conversion of 4.4 acres of forested wetland to emergent wetlands and impacts to 1.4 acres of emergent marsh. Approximately 0.4 acre of forested wetlands will be permanently converted to emergent wetland due to project implementation. As compensation for unavoidable wetland impacts the applicant proposes to purchase wetland credits from a Corps approved mitigation bank located in the watershed.