--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.

One 10 by 6 by 10-in., Worthington, steam, plunger pump.

Three horizontal boilers of the locomotive type, each of 125 h.p.

(_b_).--_Repair Shops._--The repair shops, which included blacksmith,
machine and carpenter shops, were located on the first floor of a 40 by
70-ft. two-story frame structure, which was in the pit on the north side
of 31st Street, 48 ft. east of Ninth Avenue. The second floor was on the
street level, and was used as a storehouse for hand-tools and small
plant.

The blacksmith shop contained: Four forges with hand blowers, four
anvils, and hand-tools.

The machine shop contained: One drill press, one shaper (14-in. stroke),
one 18-in. swing lathe, and one 6-in. bed lathe.

The carpenter shop contained: One circular saw, one wood lathe, and
hand-tools.

The plant in both machine and carpenter shops was operated by one
71/2-h.p. General Electric motor, the current for which was obtained from
the Edison Electric Heat, Light, and Power Company.

[Illustration:
Plate LVI.
Material Trestle Showing First Chutes in Operation;
and Views of East and West Pits at Terminal Site
Fig. 1.--Material Trestle, Showing First Chutes in Operation.
Fig. 2.--East Pit, Steam Shovel Loading Excavated Material on Car.
Fig. 3.--West Pit, Showing Condition on June 2