the water offshore, -with the result that some sand would enter the 

 harbor and perhaps ultimately lead to dredging. The amount of such 

 sand seemingly wo\ild be a factor in deciding whether a fixed dredge 

 would be more feasible than periodic use of a floating dredge. 



The fact that the sand now accumulating on the island in the 

 harbor is only one-half as coarse as the sand on the beach west of 

 the harbor, suggests that the sand in the harbor is derived largely 

 from sediment transported in -water a short distance offshore, where 

 wave and current action perhaps is weaker than in the very shallow 

 water immediately adjacent to the beach. If so, an^iappreciable 

 amount of such sand might fail to come within reach of the dredge and 

 would enter the harbor. 



At any rate the stationary dredge conceived by Sr. Holland and 

 his associates is an inspired innovation in harbor engineering. 

 Drifting sand is a serious problem at Salina Cruz. A large quantity 

 of sand, perhaps 500,000 or more cubic yards a' year, moves along 

 this beach. Unless this sand is effectively prevented frcm entering 

 the harbor, the maintenance of the port becomes a serious problem. 

 If the stationary dredge does achieve this objective, it will be a 

 rewarding engineering achievement, for which the rest of the world 

 will heartily thank our pioneering Mexican friends for providing a 

 new procedure for coping with the serious problems of shifting beaah 

 sand. 



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