EP 1110-2-13
28 Jun 96
b. Field control data. As required byEM 1110-
major and unique dams require a construction
foundation report to be completed within 6 months after
2-2300, records including field control data on methods
completion of the project or part of the project for
of compaction, in-place unit weight and moisture
which the report is written (see Appendix A of
content, piezometers, surface monuments and slope
ER 1110-1-1801 for a suggested outline for foundation
indicators are kept for use in construction, operation
reports). This report documents observations of
and maintenance of the project. Instructions regarding
subsurface conditions encountered in all excavations
specific forms to use for field data control are given in
and provides the most complete record of subsurface
ER 1110-2-1925.
conditions and treatment of the foundation. The
construction foundation report is important to dam
c.
As-constructed drawings. As construction of
safety because it saves valuable time by eliminating the
a project progresses, plans will be prepared showing the
need to search through voluminous construction records
work as actually constructed. Changes may be
of the dam to find needed information to use in
indicated in ink on prints of the construction drawings
planning remedial action should failure or partial failure
or the tracings may be revised and new prints made to
of a structure occur as a result of foundation
show the work as constructed, as specified in ER 1110-
deficiencies.
2-1200.
f.
Photographs and video tape taken during
d. Embankment criteria and foundation report.
construction. Embankment criteria and foundation and
Earth and earth-rockfill dams require an embankment
construction foundation reports should be
criteria and foundation report to provide a summary of
supplemented by photographs that clearly depict
significant design assumptions and computations,
conditions existing during embankment and foundation
specification requirements, construction procedures,
construction. Routine photographs should be taken at
field control and record control test data and
regular intervals, and additional pictures should be
embankment performance as monitored by
taken of items of specific interest, such as the
instrumentation during construction and during initial
preparation of foundations and dam abutments. For
reservoir filling. This report is usually written by
these items, color photographs should be taken. The
persons with first hand knowledge of the project design
captions of all photographs should contain the name of
and construction. The written text is brief with the main
the project, the date on which the photograph was
presentation consisting of a set of identified
taken, the identity of the feature being photographed
construction photographs, data summary tables, and as
and the location of the camera. In reports containing a
constructed drawings. This report is important to dam
number of photographs, an alternative would be an
safety because it provides in one volume the significant
index map with a circle indicating the location of the
information needed by engineers to familiarize
camera with an arrow pointing in the direction the
themselves with the project and to reevaluate the
camera was pointing, with each location keyed to the
embankment in the event unsatisfactory performance
numbers on the accompanying photographs (EM 1110-
occurs (see ER 1110-2-1901).
2-1911). Consideration should be given to using video
tape where possible to document construction of the
e.
Construction foundation report. In addition
dam.
to an embankment criteria and foundation report, all
D-3
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