Discount

A reduction in the calculated price.

Discrete Sliplining

See Sliplining(1) General term used to describe methods of lining with continuous pipes and lining with discrete pipes. (2) Insertion of a new pipe by pulling or pushing it into the existing pipe and grouting the annular space. The pipe used may be continuous or a string of discrete pipes. This latter is also referred to as Segmental Sliplining. or Lining with Discrete PipesMethod of lining with pipes shorter than the section to be renovated which are not jointed prior to insertion to form a continuous pipe, and which have not been shaped to give them a cross sectional diameter smaller than their final diameter after installation..

Diurnal

To vary during the day.

Diverting

Modifying the normal wastewater flow to allow access to some specific sewer structure; often includes bypass pumping.

Dog Plate

See Thrust BlockAn engineered structure, located between the jacking frame and the shaft wall, that distributes the jacking force developed by the hydraulic jacking frame over a large surface area to the ground behind the back wall of the shaft..