DEPARTMENT OF THE ARMY
ETL 1110-2-533
U.S. Army Corps of Engineers
CECW-ED
Washington, DC 20314-1000
Technical Letter
No. 1110-2-533
30 September 1994
Engineering and Design
LIFELINE REPORT NO. 1, SYSTEMS AT RISK FROM EARTHQUAKES,
HYDROELECTRIC POWER PLANT FACILITIES
1. Purpose
h. CEGS-13080, Seismic Protection for
Mechanical Electrical Equipment.
This engineer technical letter (ETL) provides infor-
mation on the vulnerability of electrical power-
i. ANSI A17.1, National Elevator Code, Ameri-
generating equipment and power plant facilities
can National Standards Institute, Inc., 1430 Broad-
equipment to earthquake ground motions.
way, New York, NY 10018.
j. ANSI A58, Minimum Design Loads for
2. Applicability
Buildings and Other Structures, American National
Standards Institute, Inc., 1430 Broadway, New York,
This ETL applies to all HQUSACE elements, major
NY 10018.
subordinate commands, districts, laboratories, and
field operating activities having civil works
k. NFPA 13, Standards for the Installation of
responsibility.
Sprinkler Systems, National Fire Protection Associa-
tion, P.O. Box 9146, Quincy, MA 02269.
3. References
l. Uniform Building Code, International Confer-
ence of Building Officials, 5360 South Workman Mill
a.
Executive Order 12699.
Road, Whittier, CA.
b. Public Law 101-614, National Earthquake
Hazards Reduction Program (NEHRP) Reauthoriza-
4. Background
tion Act.
a. Lifelines. Corps of Engineers lifelines are
c.
Earthquake Hazard Reduction Act of 1977.
those systems and components of Corps projects that
are critical to onsite emergency response and to the
d. ER 1110-2-1806, Earthquake Design and
conveyance of water, power, and other essential com-
Analysis for Corps of Engineers Projects.
modities to communities in times of a natural disas-
ter. An earthquake is the most likely disaster that
e. ETL 1110-2-301, Interim Procedure for
would lead to lifeline disruption.
Specifying Earthquake Motions.
b. Past practices. Past practices for the design
f. ETL 1110-2-303, Earthquake Analysis and
of mechanical and electrical equipment at Corps
Design of Concrete Gravity Dams.
projects, in most instances, did not consider how this
equipment should be anchored and configured to
g. ETL 1110-2-339, Seismic Design and Evalu-
protect it from the damaging effects of earthquake
ation of Intake Towers.
ground motions.
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