1.--Central Plant:
(_a_) Power-Generating Plant.
(_b_) Repair Shops.
2.--Retaining-Wall Plant.
3.--Pit-Excavating Plant.
4.--Transportation Plant.
5.--Dock Plant.

Horse-and-Truck Period: July 11th, 1904, to May 22d, 1905.

_1._--_Central Plant._

(_a_).--_Power-Generating Plant._--The contractor's first central
generating plant was established in a 35 by 85-ft. steel-framed building
covered with corrugated iron, the long side being parallel to Ninth
Avenue and 15 ft. from the east house line, and the north end 43 ft.
south of the south house line of 32d Street. The foundations for the
building and machinery were of concrete, resting on bed-rock, the floor
being 20 ft. below the level of the Ninth Avenue curb. The south end of
the building was the boiler-room and the north end the compressor-room,
the two being separated by a partition. Coal was delivered into a large
bin, between the boiler-house and Ninth Avenue, its top being level with
the street surface, and its base level with the boiler-room floor.

At the end of the horse-and-truck period the plant consisted of:

Two Rand, straight-line compressors, 24 by 30 in., having a capacity
of 1,400 cu. ft. of free air per min. when operating at 86 rev. per
min. and compressing to 80 lb. above atmospheric pressure.