EP 1110-2-13
28 Jun 96
to new beneficiaries, require authorization by Congress.
a. Programs. The bulk of Corps of Engineers
Additional information including eligible works, local
dams are over 30 years old, and many dams are over
protection projects, justification and cost sharing, and
60 years old. Aging structures and advances in
multiple purpose projects is given in ER 1165-2-119.
technology impact on the safety of dams and require
detailed reevaluation and, in some cases, modification.
(4) Operation and maintenance authority. To
Rehabilitation of Corps of Engineers dams is
properly operate the project or minimize maintenance,
accomplished through four programs (ER 1110-2-
reasonable changes and additions to facilities, within the
1155, ER 1130-2-417, ER 1165-2-119, Federal Emer-
project boundaries, are made as needed as part of the
gency Management Agency 1992b, Walz 1990a):
Corps' operations and maintenance program (ER 1165-
2-119). Operation and maintenance are discussed in
(1) Major Rehabilitation Program.
This
detail in Chapter 4.
program allows significant, costly, one-time structural
rehabilitation or major replacement work. This work
b. Reporting sequence. Under the Major
restores the project to its original condition to serve as
Rehabilitation and Dam Safety Assurance Programs,
originally intended.
Work under the Major
investigations are conducted and reports prepared to
Rehabilitation Program includes dams, locks,
determine the need for and scope of remedial measures,
powerhouses, and breakwaters (ER 1130-2-417).
and to form the basis for obtaining construction funds.
Reports are followed by more detailed investigations
(2) Dam Safety Assurance Program. This
which are reported in design memoranda. The design
provides for modification of completed dams when
memoranda form the basis for preparing plans and
deemed necessary for safety purposes due to new
specifications for the remedial work. More detail
hydrologic or seismic data or changes in the state-of-
regarding the Major Rehabilitation and Dam Safety
the-art design or construction criteria. This program is
Assurance Programs is given in Chapter 5.
under the authority of Section 1203 of the Water
Resources Development Act of 1986 (PL 99-662) and
permits the project to function effectively as originally
2-7. Regulatory Permit Program for Non-
intended. Examples of work under this program
Federal Dams
include enlarging existing facilities or constructing new
facilities to provide for modifications resulting from
a. Dams and dikes. Section 9 of the River and
new hydrologic or seismic data or changes in state-of-
Harbor Act of March 3, 1899, charges the Chief of
the art design or construction criteria deemed necessary
Engineers and the Secretary of the Army to regulate the
for safety purposes.
construction of any dam or dike across any navigable
water of the United States. The term "navigable waters
of the United States" means those waters of the United
(3) Modifications to completed projects.
States that are subject to the ebb and flow of the tide
Completed Corps projects are observed and monitored
shoreward to the mean high water mark (mean higher
to ascertain whether they continue to function in a
high water mark on the Pacific coast) and/or those
satisfactory manner and whether potential exists for
presently used or have been used in the past or may be
better serving the public interest. When it is found that
susceptible to use to transport interstate or foreign
changes in a completed project may be desirable,
commerce. The term "dike or dam" means any
investigations are undertaken to document the need for
impoundment structure that completely spans a
and feasibility of project modifications. To the extent
navigable water of the United States and that may
possible, modifications to completed projects are
obstruct interstate waterborne commerce. The term does
accomplished under existing authorities. Significant
not include weirs. Dams and dikes in navigable waters
modifications to completed projects involving new
of the United States also require Department of the
Federal construction or real estate acquisition in order
Army (DA) permits under Section 404 of the Clean
to serve new purposes, to in crease the scope of
Water Act of 1977, as amended (33 U.S.C. 1344). (U.S.
services of authorized purposes beyond that intended
Army Corps of Engineers, Office of the Chief of
at the time of project construction, or to extend services
2-5
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