Board of Water Supply. Laying water distribution pipes. T. A. Gillespie Company, contractor. View of the heavy Austin trenching machine taken from the south side of 86th Street near the corner of 4th Avenue. The excavating apparatus is driven by a 4 cylinder gasoline engine and is not noticeably noisy in operation. The rate of progress in material free from boulders is about 30 feet in 15 minutes. August 27, 1923.