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A year-round creek runs through this Sonoma County retreat for a semi-conductor industrialist. The plans from San Anselmo landscape architect Jori Hook called for adding a swimming pool, in-ground spa, tennis courts and and a movie pavilion to the estate.

To carry services for telephone, electrical and TV cable to the new amenities, DFLC used a directional drilling system to bore under the creek and lay 3000 feet of large conduit. It was important to comply with fish and game standards and not to disturb the natural creek.