Bore

A generally horizontal hole produced underground primarily for the purpose of installing services.

Boring

(1) The dislodging or displacement of spoil by a rotating auger or drill string to produce a hole called a bore. (2) An earth-drilling process used for installing conduits or pipelines. (3) Obtaining soil samples for evaluation and testing.

Boring Machine

A mechanism to drill earth.

Boring Pit

An excavation in the earth of specified length and width for placing the machine on line and grade.

Boulder

Per ASTMAmerican Society of Testing and Materials; technical organization formed for the development of standards on characteristics and performance of materials, products, systems and services, and the promotion of related knowledge. D653, a rock fragment, usually rounded by weathering or abrasion, with a dimension of 12 in. (305 mm) or more.