33 C.F.R. § 333.18
(a) Notice of intent. As soon as practicable after determining that a proposed activity for which Corps authorization is sought is sufficiently developed to allow for meaningful public comment and requires an environmental impact statement, the District Engineer will publish a notice of intent to prepare an environmental impact statement.
(2) In addition to a request for comment required for notices of intent for environmental impact statements, notice of intent for any environmental document may include:
(c) Scope of analysis. It is the exclusive responsibility of the District Engineer to determine the appropriate scope of analysis for the applicant's proposed activity based on the Corps' legal authority over the activity and whether the Corps has sufficient control and responsibility over any aspect of the applicant's proposed activity beyond the Corps' limited statutory authorities. When determining the scope of an environmental assessment or an environmental impact statement, the District Engineer must consider the following:
(2) The District Engineer is considered to have control, responsibility, and legal authority for portions of the project beyond the limits of Corps jurisdiction where the Federal involvement is sufficient to turn an essentially private action into a Federal action, consistent with Congress's exclusions from the definition of “major Federal action” at NEPA Section 111(10) and the Supreme Court's holding in Seven County that NEPA does not require an agency to analyze effects from actions beyond the action the agency itself is taking or authorizing.. These are cases where the environmental consequences of the larger project are essentially products of the Corps permit or 33 U.S.C. 408 permission action. Typical factors to be considered in determining whether sufficient control, responsibility, and legal authority exist to turn an essentially private action occurring outside of Corps jurisdiction into a Federal action include:
(iv) The extent of cumulative Federal control, responsibility, and legal authority.
(3) Examples:
(i) If a non-Federal oil refinery, electric generating plant, or industrial facility is proposed to be built on an upland site and the only DA permit or 33 U.S.C. 408 permission requirement relates to a connecting pipeline, supply loading terminal, or fill road, that pipeline, terminal or fill road permit, in and of itself, normally would not constitute sufficient overall Federal involvement with the project to justify expanding the scope of a Corps NEPA document to cover upland portions of the facility beyond the structures in the immediate vicinity of the regulated activity that would affect the location and configuration of the regulated activity.
Similarly, if an applicant seeks a DA permit to fill waters or wetlands or 33 U.S.C. 408 permission to alter a covered project on which other construction or work is proposed, the control, responsibility, and legal authority of the Corps, as well as its overall Federal involvement, would extend to the portions of the project to be located on the permitted fill or within the boundary of the project covered by 33 U.S.C. 408. However, the NEPA review would be extended to the entire project, including portions outside waters of the United States or the project area covered by 33 U.S.C. 408, only if sufficient Federal control, responsibility, and legal authority over the entire project is determined to exist; that is, if the regulated activities, and those activities involving regulation, funding, etc., by other Federal agencies, comprise a substantial portion of the overall project. In any case, once the scope of analysis has been defined, the NEPA analysis for that action should include the effects or impacts from the proposed action or alternatives on all Federal interests within the purview of the NEPA statute. The District Engineer should, whenever practicable, incorporate by reference and rely upon the reviews of other Federal, State, Tribal, and local agencies.
(ii) For those regulated activities that comprise merely a link in a transportation or utility transmission project, the scope of analysis should address the Federal action, i.e., the specific activity requiring a DA permit or 33 U.S.C. 408 permission and any other portion of the project that is within the control, responsibility, and legal authority of the Corps of Engineers (or other Federal agencies).
For example, a 50-mile electrical transmission cable crossing a 1 1/4 mile-wide river that is a navigable water of the United States requires a DA permit. Neither the origin nor the destination of the cable, nor its route to and from the navigable water, except as the route applies to the location and configuration of the crossing, are within the control, responsibility, or legal authority of the Corps. Those matters would not be included in the Corps' scope of analysis which, in this case, would address the impacts of the specific cable crossing.
As another example, the same 50-mile electrical transmission cable crossing a Corps civil works project requires a 33 U.S.C. 408 permission. As with the previous example, neither the origin nor the destination of the cable, nor its route to and from the civil works project, except as the route applies to the location and configuration of the crossing within the civil works project, are within the control, responsibility, or legal authority of the Corps. Those matters would not be included in the Corps' scope of analysis which, in this case, would address the impacts of the specific cable crossing on the Corps civil works project.
Conversely, for those activities that require a DA permit or 33 U.S.C. 408 permission for a major portion of a transportation or utility transmission project, such that the Corps permit or 33 U.S.C. 408 permission bears upon the origin and destination as well as the route of the project outside the Corps regulatory boundaries (including those covered by 33 U.S.C. 408), the scope of analysis should include those portions of the project outside the boundaries of the Corps jurisdiction. To use the same example, if 30 miles of the 50-mile transmission line would cross jurisdictional wetlands, other “waters of the United States,” or Corps civil works boundaries covered by 33 U.S.C. 408, the scope of analysis should reflect impacts of the whole 50-mile transmission line.
(5) In preparing the environmental assessment or environmental impact statement, the District Engineer will focus its analysis on whether the environmental effects of the regulated activity are significant.