Spoils (Muck)

Earth, rock, and other materials excavated during the installation process. Also referred to as cuttings.

Spot Repair

See Localized RepairRectification of damage to the structural fabric of the sewer, or the reconstruction of short lengths, but not the reconstruction of a whole pipeline..

Spray Lining

A technique for applying a lining of cement mortar or resin by rotating a spray head which is winched through the existing pipeline.

Springline

(1) Also Springing. An imaginary horizontal line across the sewer that passes between the points where the sewer has its greatest cross sectional width. (2) Midpoint of sewer pipe. (The line equal distance between the crown and the invert of the pipe).

Spun Lining

A bituminous lining in a pipe, made smooth or uniform by spinning the pipe around its axis.