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Abutment:
the part of a pier that receives the thrust of an arch.
Altimeter: a sensitive aneroid barometer calibrated
and graduated to measure altitudes by the decrease of
atmospheric pressure with height.
Aneroid: using no fluid.
Aqueduct: a bridge built to carry flowing water
from one point to another.
Bushing: lining for a hole through which conductors
pass, intended to insulate them or protect them from
abrasion.
Buttress: a supporting structure which props
up a wall.
Core: a waterproof layer.
Crest of a dam: the roadway or walkway at the
top of the dam; of a spillway it is the top of the spillway
over which the water flows.
Critical path analysis chart: a chart which focuses
on the essential activities of the project such as deadlines,
personnel availability.
Foundation of a dam: the undisturbed natural
material below the excavated surface on which the dam
is situated.
Full supply level (FSL): refers to the level
at which a reservoir/dam design capacity of water is
reached. In the case of the Eucumbene Dam, its design
capacity allows the dam to hold water that is equivalent
to an area of 14 500 hectares, hence area at FSL = 14
500 ha.
Gantry: a spanning framework.
Gantt chart: shows graphically the relationship
between the planned time and actual time taken to complete
an activity.
Generator: a machine that converts mechanical
energy into electrical energy.
Grouting: fill up the spaces between stones and
rocks, usually with mortar.
Height of a dam: the vertical distance between
the lowest point of the general foundation and the level
of the crest.
Hydrology: the science of water on or under the
earth, including the properties, laws and geographical
distribution of such water.
Land reclamation: the reclaiming of waste, desert,
marshy or submerged land for cultivation or other use.
Length of tunnel: the excavated length from portal
to portal; it does not include any structure added to
either end.
Lightning arrestor: drains voltage and current
spikes to earth.
Mucker: motorised shovel
Mythologisation: development of myths surrounding
a place or person.
Portal: dam gate.
Reconnaissance survey: a preliminary investigation
of the natural features of an area.
Sluices: equipment, usually gates used to control
the flow of water through dams.
Spillway: a passage through which excess water
escapes from a reservoir.
Stator: the fixed part of an electrical machine
that houses the stationary magnetic circuits.
Theodolite: an instrument for measuring vertical
or horizontal angles.
Topography: detailed description and analysis
of the geographical features of an area.
Transformer: a device that changes by electromagnetic
induction, electric energy from one or more circuits,
to one or more circuits at the same frequency.
Tributaries: rivers that flow into a main river.
Turbine: a type of hydraulic motor in which a
wheel or runner is made to revolve by the passage of
fluid.
Watercourse: a natural channel for moving water.
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