Earth Pressure Balance Shield

Mechanical tunnelling shield which utilises a full face to support the ground in front of the shield and usually employs an auger flight to extract the material in a controlled manner.

Easement

A liberty, privilege, or advantage without profit which the owner of one parcel of land may have in the hand of another. In this agreement, all land, other than public streets, in which the owner has sewer system lines or installations and right of access to such lines or installations.

Easement Access

Areas within an easement to which access is required for performance of work.

Effective Stresses

In a saturated mass of soil or rock, the total stress P minus pore water pressure, Uw.

Effluent

A generic term used to indicate the relative strength of sewer flows; from stormwater to wastewater to industrial effluent, for example.