Drills drawn from pit plant as required.
3.—Pit-Excavating Plant.
One guy derrick, 50-ft. mast and 45-ft. boom, operated by a Lambert two-drum and swing-gear hoisting engine, with Lambert 25-h.p. upright boiler.
Three stiff-leg derricks, similar to those used on the retaining wall work.
Three Bucyrus, 70-ton steam shovels with 3½-cu. yd. dippers.
One traveling derrick, built with an A-frame of 12 by 12-in. timbers, 15-ft. mast, and 25-ft. boom; the traveler carried an engine and boiler similar to those used on the stiff-leg derricks, and was used on the Seventh and Eighth Avenue sewers, as well as in the pit.
Ten Rand-Ingersoll rock drills, Nos. 1, 3¼, and 4.
One Reliance stone crusher (nominal capacity 17 tons of crushed stone per hour) belt-driven by 50-h.p. engine.
4.—Transportation Plant.
During the whole of the first period the transportation plant consisted of two-horse trucks and snatch teams as needed. The number varied greatly from 25 at the beginning and end of the period to an average of 135 from August 1st to December 1st, 1904, about 10% of the total number of teams being used as snatch teams.