d. Shore Erosion. During periods of heavy traffic, wave action at each ramp may cause the shore to be eroded.
The end span anchorage system (shore guys) must be taut to keep bridge movement to a minimum. If the erosion contin-
ues, the ramps should be raised and sand bags or other suitable fill material be placed under ramp roadways. Ramps
should be lowered. This condition can often be eliminated by adding an interior bay and pulling the ramps farther onto
e. Leakage. At three hour intervals during heavy traffic inspect the pontons for leakage. If significant water is discov-
ered, pump it out as described in para. 2-25, bilge pump operation.
f. Water Debris. Do not allow debris to build up against upstream side of bridge. Remove debris as needed to pre-
vent damage to the bridge.
Roadway Debris. During periods of heavy traffic dirt and foreign materials may accumulate on roadway surface.
Wash down roadway surface using pressure pump as described in para. 2-25, pressure pump operation.
2-25. Operation of Auxiliary Equipment.
a. General. A gasoline engine driven 2 in. self-priming centrifugal pump is supplied for use in pumping the bay bilges
(pontons). A nozzle is provided enabling use of the pump to supply water under pressure for washing down the bays.
b. Bilge Pump Operation
(1) Connect suction hose (1) to pump (2).
(2) Remove bilge plug (3), and insert hose (1) to bottom of bilge.
(3) Connect discharge hose (4) to pump (2) and place hose (4) overboard.
(4) Start and operate pump (2) in accordance with TM 5-4320-200-13&P.
(5) When bilge has been pumped dry stop engine in accordance with TM 5-4320-200-13&P.
(6) Remove hose (1) from bilge and install bilge plug (3).
Perform Steps (1) through (6) for remaining bilges to be pumped. Perform Steps (7) through (9) after all
bilges have been pumped.
(7) Disconnect discharge hose (4) from pump (2).
(8) Disconnect suction hose (1) from pump (2).
(9) Storehouses and (4) and pump (2).