EP 1110-2-13
28 Jun 96
operations engineers. The evaluations are aided by
b. Design memorandum. As a minimum, the
programs
(Duscha
1982).
DM on initial reservoir filling will include:
Instructions for periodic inspection and continuing
evaluation of dams are given in ER 1110-2-100.
(1) The preferred filling rate and the available
Additional information on inspection of dams is
options to control the rate of reservoir rise.
available (Federal Emergency Management Agency
1979, Colorado Division of Disaster Emergency
(2) The surveillance necessary to detect most
Services 1987, Reed 1987). The periodic inspection
likely occurring problems.
program has one potentially dangerous aspect in that
engineers might be tempted to place too much reliance
(3) A plan for reading the instruments and
on it and assume that a project once inspected has a
evaluating the data.
guarantee of safety until the next inspection. The
thorough occasional inspection is invaluable but
(4) A plan for inspecting the dam and down
cannot take the place of day-to-day observation by
stream areas.
operating personnel for detection of potentially
dangerous problems at an early and repairable stage
(5) Instructions for observers on conditions that
(James 1990).
require immediate attention of personnel authorized to
make emergency decisions.
b. Scope of inspections. Corps of Engineers
civil works structures such as dams, powerhouses, and
(6) An emergency plan listing responsibilities,
appurtenant dam structures (intake and outlet works,
name, and/or positions, telephone numbers and radio
spillways, and tunnels) will be periodically inspected
frequencies to be used.
in accordance with procedures in Appendix A of
ER 1110-2-100 to detect conditions of significant
c.
Existing Corps reservoir projects. Existing
distress or operational inadequacy.
operational projects, where the maximum pool (top of
flood pool) has not been experienced, will be reviewed
c.
Frequency of inspections.
The first
for compliance with requirements as outlined in
periodic inspection is carried out immediately after
paragraph 4-4.b.
For those conditions where
topping out and prior to impoundment of the pool for
contingency plans have not been documented and
new earth and rock-fill dams. The initial inspection of
potential danger exists due to filling and/or impounded
concrete dams is accomplished immediately prior to
storage, a report is required outlining those plans. The
impoundment of reservoir water. The second
document may be titled "Flood Emergency Plan"
inspection for new earth and rock-fill dams is made at
providing that additional initial filling requirements are
a reasonable stage of normal operating pool. The
deemed not to have significant potential impacts on the
second inspection of concrete dams is made when the
safety of the structure (EM 1110-2-3600).
reservoir water attains the normal operating pool, and
in either case no later than one year after initial
4-5. Periodic Inspection and Continuing
impoundment has begun. Subsequent inspections for
Evaluation
earth and rock-fill dams and concrete dams are made
at one-year intervals for the following three years, at
two-year intervals for the next four years and then
a. General. A formal program for periodic
extended to five-year intervals if warranted by the
inspection and continuing evaluation of completed Corps
results of the previous inspections (ER 1110-2-100).
of Engineers projects was established in 1965. Under
this program, structures whose failure or partial failure
d. Procedure.
A systematic plan is
would endanger the lives of the public or cause
established for the inspection of features related to the
substantial property damage are periodically evaluated to
safety and stability of the structure and to the
ensure their structural safety, stability, and operational
operational adequacy of the project. Operational
adequacy. Inspections and evaluations are performed by
adequacy means the inspecting, testing, operating, and
teams of experienced design, construction,
and
evaluation of those components of the project whose
4-2
Previous Page
