Availability of a Tiered Final Environmental Impact Statement Containing a Draft Air Quality General Conformity Determination for the Proposed Construction of a Dredged Material Containment Facility in the Patapsco River, at Masonville, Baltimore City, MD
In accordance with requirements of the National Environmental Policy Act (NEPA), the U.S. Army Corps of Engineers (USACE), Baltimore District, has prepared a Final Environmental Impact Statement (FEIS) for the proposed construction of a dredged material containment facility (DMCF) by the Maryland Port Administration (MPA). This FEIS was prepared as part of the submission of MPA's application for a Department of the Army permit to construct the facility in the Patapsco River, Baltimore City, MD. This application will be evaluated pursuant to Section 10 of the Rivers and Harbors Act of 1899 and Section 404 of the Clean Water Act. The preferred alternative is for the construction of a stone, sand, and cofferdam structure that would impact approximately 131 acres of waters of the United States, including jurisdictional wetlands. The structure would be initially constructed to 10 feet above the mean lower low water (MLLW) elevation, with a future temporary elevation to 42 feet above MLLW, and an ultimate elevation of 36 feet above MLLW. The project would also include mechanical dredging of approximately 1.5 million cubic yards of overburden material within the footprint of the proposed disposal site, and the placement of this material at the Hart Miller Island disposal site, Baltimore County, MD. On-site (Masonville borrow) and offsite borrow material (Seagirt borrow material and upland borrow) would be used for the construction of the containment facility. The Seagirt borrow material would come from the Seagirt Marine Terminal Access Channel deepening and widening project. The Draft EIS was advertised in the Federal Register on May 19, 2006 (71 FR 29128). A supplement to the Draft EIS was advertised in the Federal Register on June 30, 2006 (71 FR 37545). The need to prepare a Supplement was due to the applicant's proposal to change the source of borrow material for the proposed construction of the preferred alternative to include the use of suitable material dredged from the Seagirt Marine Terminal Access Channels. The FEIS evaluates the construction of a DMCF with a footprint of 141 acres, which includes 131 acres of tidal open water and wetlands. The DMCF would be constructed to an initial height of 10 feet above MLLW and then raised to a height of 42 feet above MLLW before being graded to a final height of 36 feet MLLW, which would be the same height as the adjacent land. A detailed description of the proposed project and effects to the human environment are discussed in the FEIS for the Masonville DMCF. The FEIS outlines measures the applicant may implement to address impacts to air quality resulting from activities described in the permit application.