Glossary

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A B C D E F G H I J L M N O P R S T U V W X
Uncased bore
Any bore without a lining or pipe inserted, i.e., self-supporting, whether temporary or permanent.
Upsizing
Any method that increases the cross-sectional area of an existing pipeline by replacing it with a larger diameter pipe.
Utility Corridor
Duct in which two or more different utility services are installed with access for maintenance. Also referred to as a Common Utility Tunnel, Common Duct or Utilidor.