Engineers Corps February 2007 – Federal Register Recent Federal Regulation Documents

The Corps of Engineers (Corps) is preparing a Draft Environmental Impact Statement (DEIS) to address operational changes at Center Hill Dam that could affect pool elevations. Center Hill Dam impounds Center Hill Lake in central Tennessee. The DEIS is necessary to provide National Environmental Policy Act (NEPA) compliance to address changes that could include, but are not limited to water quality, aquatic, riparian, and terrestrial habitat, recreation, water supply, flood storage, economics, hydropower production, and safety as a result of operating Center Hill Lake below normal pool elevations for extended periods of time. Several engineering studies have identified a heightened level of risk at Center Hill Dam due to increasing seepage problems under and around the dam. Since March 2005, the Corps has attempted to keep fall, winter and early spring lake levels from extreme rises due to high inflow. Seepage problems are made worse during continual high lake levels. As a result, the Corps plans to maintain lower lake levels, but still within the operations curve, to reduce pressure on the dam foundation, abutments, and rim walls until a permanent remedy is in place. A major grouting project to address the dam seepage is scheduled for the fall of 2007, followed by installation of a cutoff wall through the earthen portions of the dam and adjoining rim walls. Although not anticipated, the Corps may have to lower the lake pool significantly below the operating pool should seepage conditions worsen, or new information determine this action is necessary to reduce risk. This notice serves to initiate the NEPA process. The Corps plans to prepare and circulate a DEIS which serves to cover possible impacts due to extreme changes in lake levels that could occur during the repair of the dam's foundation and abutments.

The U.S. Army Corps of Engineers (COE), Wilmington District, Wilmington Regulatory Field Office has received a request for Department of the Army authorization, pursuant to Section 404 of the Clean Water Act and Section 10 of the Rivers and Harbor Act, from Figure ``8'' Beach Homeowners Association to develop a management plan for Rich Inlet that would mitigate chronic erosion on the northern portion of Figure Eight Island so as to preserve the integrity of its infrastructure, provide protection to existing development, and ensure the continued use of the oceanfront beach along the northernmost three miles of its oceanfront shoreline. Figure Eight Island is an unincorporated privately developed island located on the southeast coast of North Carolina, approximately eight miles north of Wilmington. The island is bordered to the south by Mason Inlet and Wrightsville Beach; and to the north by Rich Inlet and Lea-Hutaff Island, an undeveloped, privately-owned island. The inlet management plan would involve the repositioning and realignment of the main ebb channel of Rich Inlet to a location closer to the north end of Figure Eight Island. The intended alignment is to be essentially perpendicular to the oceanfront shorelines of the adjacent islands. The new channel position would be periodically maintained with maintenance episodes dictated by natural shifts in the channel position that produce unfavorable shoreline responses on the north end of Figure Eight Island. While the main focus of the project is to relocate the main ebb bar channel, consideration will also be given to possible alterations in Nixon Channel and Green Channel to determine if such modification would enhance the stability of the new channel. Nixon Channel meanders along a southwesterly path on the landward side of the north end of Figure Eight Island; connecting to the Atlantic Intracoastal Waterway (AIWW) at a point approximately two miles west of the Rich Inlet throat. Green Channel meanders to the northeast on the landward side of Lea-Hutaff Island and intersects with the AIWW approximately 1.75 miles north of the Rich Inlet throat. Material dredged from the inlet and channels will be placed along the central and northern portions of Figure Eight Island and, if needed, along portions of Lea-Hutaff Island. The objective of the placement of beach fill along the Figure Eight Island's shoreline is to keep the design fill density less than 50 cubic yards/foot, to avoid the placement of a permanent static vegetation line. This beach fill would be maintained through a program of periodic beach nourishment events with the material extracted from the dredging of Rich Inlet to maintain the inlet in an optimum location.

Section 116 of Pub. L. 108-447, dated December 8, 2004, authorized the U.S. Army Corps of Engineers' (Corps) participation in construction of the Central City project. A Final Environmental Impact Statement (FEIS) was completed for the Central City Project in Janauary 2006. A Record of Decision (ROD) recommending the Community-Based Alternative and determining it was technically sound and environmentally acceptable was signed by the Assistant Secretary of the Army for Civil Works (ASA (CW)) on April 7, 2006. An Interim Feasibility Report with Integrated Environmental Assessment (with signed Finding of No Significant Impact) for the Riverside Oxbow Project was approved by the Chief of Engineers on May 29, 2003. An addendum, dated April 2005, was prepared to address comments from the ASA (CW); however, neither construction funding nor authority for implementation of this project has been provided by Congress to date. By letter dated June 22, 2006, the City of Fort Worth requested the Corps to evaluate the potential benefits of merging the Central City Project with the Riverside Oxbow project. They identified potential benefits including greater opportunity for valley storage requirements, increased restoration opportunities, and cost savings. After an initial evaluation, the Corps determined that alternative areas along the West Fork of the Trinity River including areas within the Riverside Oxbow project had the potential to provide the required hydraulic mitigation, provide comparable ecosystem restoration outputs, reduce habitat mitigation requirements, and lower overall project costs. These potential modifications to the projects may be substantial and a supplement to the Central City environmental impact statement should be prepared concurrently with a more detailed analysis. Therefore, this Notice of Intent to prepare Supplement No. 1 to the FEIS for the Central City project is being issued in accordance with the Council on Environmental Quality's NEPA implementing regulations at 40 CFR Parts 1500-1508.

This notice of availability announces the public release of the Draft Supplemental Environmental Impact Statement (DSEIS) to evaluate construction of authorized improvements to the Federal Gulfport Harbor Navigation Project in Harrison County, MS. The Mobile District, U.S. Army Corps of Engineers (Corps) published in the Federal Register, March 31, 2006, (71 FR 16294) a Notice of Intent to Prepare a DSEIS to address the potential impacts associated with construction of authorized improvements to the Federal Gulfport Harbor Navigation Project in Harrison County, MS. The DSEIS was used as a basis to ensure compliance with the National Environmental Policy Act (NEPA) and for evaluating the following two alternative plans: ``No Action'' and widening to the authorized project dimensions. Gulfport Harbor is authorized to (a) a channel 38 feet deep by 400 feet wide and about 8 miles long across Ship Island Bar; (b) a channel 36 feet deep by 300 feet wide and about 12 miles long through Mississippi Sound; and (c) a stepped anchorage basin at Gulfport Harbor 32 to 36 feet deep by 1,120 feet wide and 2,640 feet long. The tentatively recommended alternative includes construction of the authorized project dimensions.

Pursuant to 30 CFR 230.8, the U.S. Army Corps of Engineers (Corps) is issuing this Notice to document emergency actions and set forth the steps to be taken in the future to comply with the National Environmental Policy Act (NEPA). Wolf Creek Dam impounds Lake Cumberland in south central Kentucky. Several engineering studies have identified a high level of risk at Wolf Creek Dam. Accordingly, on January 19, 2007, the Corps made the decision to take emergency action and begin lowering the lake level to ease the stress on the dam's foundation until repairs can be effected. This action has been taken to reduce risk to the public's safety and welfare. The temporary target elevation will be 680 feet above mean sea level (msl) at Wolf Creek Dam. This elevation was selected because it provides the greatest reduction in stress to the dam without creating other public health and safety concerns. This operation will be in effect until repair of the dam or new information allows the pool elevation to be raised. This pool elevation may also drop if worsening conditions create the need for even further lowering of the pool. The Corps believes that the need for action regarding the Wolf Creek Dam is so urgent and compelling that there is no time to follow the usual NEPA procedures before the Corps makes decisions and begins to implement them. The Corps is, therefore, invoking its authority ``Emergency Actions'' under 33 CFR 230.8 and declaring an emergency, making decisions, and taking necessary actions accordingly. The Corps has consulted the President's Council on Environmental Quality (CEQ) regarding alternative arrangements under NEPA pursuant to 40 CFR 1506.11. This notice serves to initiate the NEPA process. The Corps plans to prepare and circulate an EIS which serves to cover any actions it deems necessary during the repair of the dam's foundation.