cut through the divide into Yellow Creek, thence via Yellow Creek to mile 215 on the sailing line of the Tennessee River in Pickwick Pool near the common boundary of Alabama, Tennessee, and Mississippi. The overall project length, Demopolis to the Tennessee River, corrected for proposed cutoffs, is 253 miles. County route map is appended as Exhibit “A”.
The project is divided into three reaches. The river section extends from Demopolis for 168 miles to a point just south of Amory, Mississippi. The plan for that reach includes channel improvement and a series of four conventional locks and dams. For the next 45 miles, the waterway will consist of a canal parallel to the river and separated therefrom by levees. The difference in elevation in that reach will be overcome by five canal locks. The canal terminates at Bay Springs lock and dam in Mackeys Creek, where the waterway will be lifted 84 feet to the pool elevation of the Pickwick reservoir on the Tennessee River. From the pool of the Bay Springs lock and dam a deep cut will be made through the ridge to the Pickwick pool on the Tennessee River, via its tributary, Yellow Creek. Length" of the divide section is 40 miles, including the 27-mile-long cut through the ridge. Overall difference in elevation between Demopolis and Pickwick pools is 341 feet, to be overcome by the 10 locks, referenced above.
The plan provides for lock chamber dimensions of 110 by 600 feet. Authorized depths are 9 feet in the river section and 12 feet in the canal and divide sections. Authorized bottom width is 300 feet except in the actual divide cut, where the authorized width is 280 feet.
The waterway project will require the commitment of approximately 70,000 acres of land which presently are in forest or are used for agricultural pursuits. Of this amount about 24,000 acres would be fully committed, with the remainder committed in varying degrees. The land, which is presently planned to be procured by permanent easement, will not be completely removed from the agricultural and forest base. The bottom land hardwood and other forest areas which are cleared or inundated will be lost for future timber production. About 40,000 acres of artificially impounded water surface will be created as a result of the project, and within the confines of the newly established lakes about 170 miles of tributary streams and 140 miles of the main stem of the Tombigbee River will lose their identity as free-flowing streams. However, the dams on the waterway will be “run-of-the-river” dams built for low retention and subject to complete inundation in flood seasons. Admittedly, the project will have significant effects, some adverse and others beneficial, upon the quality of the environment in its present setting.
(b) Nature of Litigation and Prior Proceedings.
The present litigation began on July 14, 1971, upon the filing of a class action in Federal District Court for the District of Columbia against the Corps of Engineers, the Secretary of the Army and Chief of Engineers to restrain them from initiating or continuing with the construction of the project. The named plaintiffs were two organizations, Environmental Defense Fund, Inc. (EDF), a non-profit New York corporation whose membership consists of scientists, environmentalists and other interested citizens throughout the United States, some residing in the project area of Alabama and Mississippi, and the Committee for Leaving the Environment of America Natural (CLEAN), a nonprofit unincorporated association located at Starkville, Mississippi, whose membership is composed of Mississippi and Alabama residents who enjoy and are interested in preserving the natural environment of the Tombigbee region, and a single individual, James D. Williams, an assistant professor of biology at Mississippi State College for Women and a resident of Columbus, Mississippi. The complaint set forth seven independent causes of action charging that the defendants had violated various federal