Change Order

A written order to the contractor authorizing an addition, deletion or revision in the work, within the general scope of work of the agreement, authorizing an adjustment in the agreement price or agreement time.

Channel

A prepared flow route within the bench of a manhole that conveys the incoming flow to the downstream pipe.

Charge Line

See Feed LinePipeline that transports drilling fluid from the slurry separation plant to the face of the MTBM. Also known as an inlet line or charge line..

Chemical Grouting

Method for the treatment of the ground around a shaft or pipeline, using non-cementitious compounds, in order to facilitate or make possible the installation of an underground structure.

Chemical Resistance

Ability to render service in the transport of a specific chemical for a useful period of time at a specific concentration and temperature.