Page 292 - Moving the Earth_ The Workbook of Excavation
P. 292
PONDS AND EARTH DAMS
6.28 THE WORK
get at, so that it must usually be moved by a line stretched to shore, as in (C). This will not pull it
into a horizontal position and may have difficulty raising it from down position also.
A more satisfactory arrangement for underwater use is shown in Fig. 6.19. The drainpipe is
extended by means of a tee, a close nipple, another tee, a short pipe, and a cap. The tees are fitted
with pipes long enough to reach the surface of the water. These are set at an angle of about 45° from
each other, and the tees welded together. One of the pipes is capped and a ring fastened to it.
FIGURE 6.18 Elbow drain.
FIGURE 6.19 Elbow drain with pull arm.
