EP 1110-2-13
28 Jun 96
c.
Arch dam. A concrete or masonry dam
h. Double curvature arch dam. An arch dam
which is curved upstream so as to transmit the major
which is curved vertically as well as horizontally.
part of the water load to the abutments.
i.
Earth dam. An embankment dam in which
d. Buttress dam. A dam consisting of a
more than 50 percent of the total volume is formed of
watertight part supported at intervals on the
compacted earth material generally smaller than
downstream side by a series of buttresses. A Buttress
3-inch size.
dam can take many forms, such as a flat slab or a
massive head buttress.
j.
Embankment dam. Any dam constructed of
excavated natural materials or of industrial waste
e.
Cofferdam. A temporary structure enclosing
materials.
all or part of the construction area so that construction
can proceed in the dry. A diversion cofferdam diverts
k.
Gravity dam.
A dam constructed of
a stream into a pipe, channel, tunnel, or other
concrete and/or masonry which relies on its weight
watercourse.
and internal strength for stability.
f.
Crib dam. A gravity dam built up of boxes,
l.
Hollow gravity dam. A dam constructed of
crossed timbers, or gabions filled with earth or rock.
concrete and/or masonry on the outside but having a
hollow interior and relying on its weight for stability.
g. Diversion dam. A dam built to divert water
from a waterway or stream into a different water-
course.
m. Hydraulic fill dam.
s.
Regulating dam. A dam impounding a
An earth dam
constructed of materials, often dredged, which are
reservoir from which water is released to regulate the
conveyed and placed by suspension in flowing water.
flow downstream.
n. Industrial waste dam. An embankment
t.
Rockfill dam. An embankment dam in
dam, usually built in stages, to create storage for the
which more than 50 percent of the total volume is
disposal of waste products from an industrial process.
composed of compacted or dumped cobbles,
The waste products are conveyed as fine material
boulders, rock fragments, or quarried rock generally
suspended in water to the reservoir impounded by the
larger than 3-inch size.
embankment. The embankment may be built of
conventional materials but sometimes incorporates
u. Roller-compacted concrete dam.
A
suitable waste products.
concrete gravity dam constructed by the use of a dry
mix
concrete
transported
by
conventional
o. Masonry dam. Any dam constructed mainly
construction equipment and compacted by rolling,
of stone, brick, or concrete blocks jointed with
usually with vibratory rollers (EM 1110-2-2006,
Hansen and Reinhardt 1991).1
mortar. A dam having only a masonry facing should
____________________________
not be referred to as a masonry dam.
1
References cited in the appendixes are listed in
Appendix A.
p. Mine tailings dam. An industrial waste dam
in which the waste materials come from mining
v.
Rubble dam. A stone masonry dam in
operations or mineral processing.
which the stones are unshaped or uncoursed.
q. Multiple arch dam.
A buttress dam
w. Saddle dam (or dike). A subsidiary dam of
composed of a series of arches for the upstream face.
any type constructed across a saddle or low point on
the perimeter of a reservoir.
r.
Overflow dam.
A dam designed to be
overtopped.
B-4
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