Drilling and preparation of reusable, long range, horizontal bore holes in rock and in gouge
By: J. C. Harding ... [et al.].
Contributors: Harding, J. C.; United States. Federal Highway Administration. Office of Development.
Series: Report - Federal Highway Administration ; no. FHWA-RD-75-97
Publisher: Dept. of Transportation, Federal Highway Administration, Offices of Research & Development; for sale by the National Technical Information Service
Published: 1975
Place of publication: Washington; Springfield, Va
Language: eng
Subjects: Tunneling.; Rock-drills.; Underground construction.
Notes: Performed by Foster-Miller Associates, Inc., under contract DOT-FH-11-8486.

Final report; May 1976.

Includes bibliographical references.
Table of contents: value: v. 3. A development plan to extend penetration capability, increase accuracy, and reduce costs.