EP 1110-2-13
28 Jun 96
4-6. Reporting Distress
failure or failure to operate properly would impair the
operational capability and/or usability of the structure.
a. Guidance. Evidence of distress at, or poten-
These components include, but are not limited to:
tial failure of, dams is to be reported in accordance
(1) Flood and outlet control gates (including flood
with the guidance set forth in ER 1110-2-101.
gates in levees and flood walls).
Evidence of distress will be immediately reported to
the district office. Where engineering evaluation of
(2)
Navigation lock gates and valves.
the evidence of distress indicates the need for
(3)
Emergency closure gates.
immediate remedial action, the district commander
will immediately report such conditions through
(4) Associated hoists and operating machinery
command channels to the HQUSACE Dam Safety
(including safety devices such as limit switches and fail-
Officer who is the Chief of the Engineering Division,
safe interlocks).
Directorate of Civil Works. Each USACE Command
(5)
Flood control pumps and related equipment.
will also establish procedures for notification of the
major subordinate command and district Dam Safety
(6)
Cathodic protection systems.
Officer and coordination of all information with their
Details concerning the systematic inspection plan are
counterparts in the Emergency Management element.
given in Appendix A of ER 1110-2-100.
The HQUSACE Dam Safety Officer will notify the
Director of Civil Works, and the Commander,
e.
Reports.
USACE. If the HQUSACE Dam Safety Officer
cannot be contacted, the reporting field office will
(1) Pre-inspection brochure.
A technical
follow the notification sequence as outlined in
brochure is prepared in advance of each project
Appendix A of ER 1110-2-101.
inspection to familiarize inspection team members with
general features of the project. This brochure includes a
b. Examples. Examples of evidence of distress
technical summary of the structural, material, and
include, but are not limited to:
foundation conditions; instrumentation data; and a list of
(1) Significant sloughs, settlement, or slides in
the deficiencies found in previous inspections, if
embankments such as earth or rockfill dams, urban
pertinent, and the status of remedial actions
levees, and bridge abutments or slopes of spillway,
recommended. Also, the brochure should include, as
channels, locks, and dam abutments.
appropriate, pertinent project data, layout and typical
section drawings, summaries of subsurface soil profiles
(2) Evidence of piping, muddy water boils in
and boring logs, and the checklist developed for
the area of a structure such as embankments,
conducting the inspection (ER 1110-2-100, Duscha and
abutments, dam monoliths, lock walls, or cofferdams.
Jansen 1988).
(3) Abnormal increase or decrease of flow
(2) Initial and subsequent reports. A condition
from foundation drains, structural joints, or face drains
report will be prepared to present the results of each
of concrete dams.
general project inspection. Report No. 1 (report of initial
inspection) will provide a general project description and
(4) Any increase in seepage quantities through
present the results of the initial inspection. Reports of
or under embankments or in abutments.
subsequent inspections will be supplementary to the
initial report and will focus on changed conditions noted
(5) Any increase or decrease in pore water
since the previous inspection. A status report on
pressure in either embankments or their foundations or
recommended remedial measures not completed prior to
abutments.
approval of the previous inspection report will also be
included (ER 1110-2-100, Duscha and Jansen 1988).
(6) Any increase or decrease in uplift pressures
under concrete structures.
4-3
Previous Page
