DIRECTIONAL DRILLING FOR GAS LINE SETS TWO RECORDS

Martin Cherrington, Kenneth R. Weeks Cherrington Corp. Sacramento Harold Y. Anderson H.Y. Anderson Engineers San Rafael, Calif. Successful directionally drilled crossings of three major elevated waterways in California shows that long distance, large-diameter crossings are possible even in such environmentally sensitive areas. The crossings, part of the PGT-PG&E (Pacific Gas Transmission Co./Pacific Gas & Electric Co.) 900 mile, 42 and 36-in. expansion of its natural gas system from Canada to

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