Emergency Repair
A repair that must be made while the main is pressurized, or flowing.
Emergency Stop
A red manually operated push button that, when activated, stops all functions of the machine.
Encrustation
Used to describe deposits left by the partial evaporation of infiltrating groundwater containing dissolved salts. CanA principal module that is part of a shield machine such as an MTBM or tunnel boring machine (TBMs); its use depends on the installation dimensions required and the presence of an articulated joint to facilitate steering. The can may also be referred to as a trailing tube. be classified into light, medium or heavy by percentage loss of cross-sectional area.
End Section
Flared attachment on inlet and outlet of a culvert to prevent erosion of the roadbed improve hydraulic efficiency, and improve appearance.
Endurance Limit
The maximum stress that a material can withstand for an infinitely large number of fatigue cycles (See Fatigue StrengthThe stress to which a material can be subjected for a specified number of fatigue cycles.).