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mark its width disappear, the engineers in charge can im- 

 mediately know to what extent silting up has taken place 

 when the river begin to lower in its superior part, as they 

 are warned of this by direct telegrafic communication. In 

 this way there is the necessary time to remove the partly 

 filling over a reduced width, to complete this later on over 

 the entire width between the buoys. 



It may be assured that three fourth parts of the work to 

 be carried out in sand and gravel will be a permanent im- 

 provement and that it will be necessary to maintain the 

 rest, but this maintainance will become less in time becau- 

 se it is believed that the sand is not kept in suspension 

 and only brought down during the great flows of water, 

 and that in consequence the first filling of the channels 

 during a high river is therefore due to the steep slopes 

 and great difference of the height of the bottom immediate 

 to the channels cut through the bars. 



In short, the improvement of the navigability of the 

 River Uruguay in the conditions as explained is a work easy 

 to carry out and of great consequence if carried out with 

 the necessary speed, method and energy. 



As the plan of the works are based on studies suffi- 

 ciently complete for the object in view, and as already 

 dredging works and demarcation by signals has been car- 

 ried out, which so far have given a good result, there is 

 much reason to believe that in the relative short time of 

 two years, all the obstacles, which now difficult navigation 

 to Concordia, will have disappared, if the approval of the 

 Superior Government can be obtained and if the necessary 

 means can bo disposed of. 



Willi the surveys realized up to this date it has been 

 partly possible to study the regimen and conditions of the 

 River Uruguay, in order to design the necessary works of 

 improvement lor navigation; the pari situated between 

 Concepeion del Uruguay and the River Plate lias only 

 been surveyed and studied partly, and this work has been 

 completed by a general recognizance, for this reason 

 those estudies will he continued in this pari of the river, 

 which, it may be stated is yet unperfectly known, specially 

 the part between Fray Bentos and Concepeion del Uru- 



ould 



