in the main room. The motion of the tubes, up, down, and to the 

 sides is accomplished by three electric winches which are con- 

 trolled by an operator stationed at the central window between the 

 suction tubes. The sand is pumped out through a pipe that runs 

 between the dredge and the breakwater on a straight line to the 

 beginning of the wharves, inhere a sub-station has been constructed 

 with motors and pumps the same as in the main station. The pipe 

 runs along the wharves across the entrance to the repair area of 

 the harbor and discharges on the shore east of the eastern break- 

 water. A removable pipe section is used in crossing the entrance. 

 The sand is pumped a distance of 2,200 meters. When the traffic 

 of the port increases, it will be necessary to run the pipe on 

 land from the sub-station around and in back of the repair basin 

 thus eliminating necessity of uncoupling the pipe at the entrance 

 to the harbor. 



The fact that this efficient dredge, which does the same work 

 as one afloat, has its machinery in a fixed edifice induced us to 

 name it "Draga Fija" . (Fixed Dredge). 



The operation of this dredge is very simple and very cheap, 

 costing little more than 20 centavos a cubic meter to pump the 

 sand to the beach, as against a cost of two or three pesos a cubic 

 meter for boat dredging. 



A dredge operator and an electrician with their helpers are 

 all that is needed for the operation of the dredge . 



The dredge will not pump all of the required sand from the 

 bay but when this new equipment is functioning normally there will 

 be time to check its condition. Not less than 2 or 3 million 

 cubic meters of sand will have to be removed in order to put the 

 port in a reasonable condition. 



Without the fixed dredge, the removal of the sand by floating 

 dredges would be an impossible operation, as has been shown by 40 

 years experience. 



The fixed dredge conceived by us is progressing very well. It 

 furnishes a new method of resolving many of the obstacles encountered 

 in the control of littoral drift. If the expected success is obtained, 

 there will be international reprecussions for there are many ports in 

 the same condition, and the cause of Commerce and World production 

 will be benefited. 



The dredge has cost about 10 million pesos of which 6 million was 

 used to purchase machinery. The machinery was purchased from the 

 Wert Conrad Company who specialize in the construction of dredges, 

 and was paid for in sugar. The civil engineering was done by the 



