33 CFR § 230.7 - Actions normally requiring an Environmental Assessment (EA) but not necessarily an EIS.
Actions normally requiring an EA, but not an EIS, are listed below:
(a) Regulatory Actions. Most permits will normally require only an EA.
(b) Authorized Projects and Projects Under Construction. Changes which may be approved under the discretionary authority of the Secretary of the Army.
(c) Continuing Authorities Program. Projects recommended for approval of the Chief of Engineers under the following authorities:
(1) Section 205, Small Flood Control Authority;
(2) Section 208, Snagging and Clearing for Flood Control Authority;
(3) Section 107, Small Navigation Project Authority;
(4) Section 103, Small Beach Erosion Control Project Authority; and
(5) Section 111, Mitigation of Shore Damages Attributable to Navigation Projects.
(d) Construction and Operations and Maintenance. Changes in environmental impacts which were not considered in the project EIS or EA. Examples are changes in pool level operations, use of new disposal areas, location of bank protection works, etc.
(e) Real Estate Management and Disposal Actions.
(1) Disposal of a Civil Works project or portions of project properties not reported as excess to the General Services Administration.
(2) Disposal of real property for public port and industrial purposes.
(3) Grants of leases or easements for other than minor oil and gas transmission lines, electric power transmission lines, road and highway rights-of-way, and sewage or water treatment facilities and land fills.