Fig. 2.--East Pit, Steam Shovel Loading Excavated Material on Car.
Fig. 3.--West Pit, Showing Condition on June 28th, 1905.]

_2._--_Retaining-Wall Plant._

Three cableways, with 35-ft. towers of 12 by 12-in. yellow pine timber
capable of spanning 350 ft., and operated by 7 by 10-in. double-drum
Lambert hoisting engines mounted with 25-h.p. Lambert upright
boilers.

Five stiff-leg derricks, with masts from 35 to 50 ft. long and booms
from 45 to 60 ft. long, operated by 7 by 10-in. Lambert double-drum
and swinging gear engines, mounted with 25-h.p. upright Lambert
boilers.

Six Cameron pumps, varying in size from 7 by 6 by 13 in. to 10 by 8
by 16 in. The first dimension referring to the diameter of the steam
cylinder, the second to that of the water, and the third to the
stroke.

Five Rand sheeting drivers.

Two Ransome ¾-cu. yd. concrete mixers, mounted on frame, with
kerosene driving engine.

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