40 



One towboat ( 204 B ). 



Four ordinary hopper barges. 



One mud pump, transformed into suction dredger ( C 12 ). 



One steamer for inspection ( B 105 type ). 



With these elements added to the dredger «9 C» and 

 «11 C» a monthly cube of 84.000 meters may be dredged 

 and calculating 8 months of work for every year ( taking 

 into account the losses caused by high water or repairs) 

 a total of 1.344.000 M 3 will be excavated at this rate, 

 which is a difference in favour of about 200.000 cub. meters. 

 Therefore as far as dredging is concerned, the working- 

 plan can perfectly be realized. 



Besides these elements, the acquisition of which is fore- 

 seen in the price calculated for this class of work, it would 

 be useful if for the breaking up and extraction of the stones, 

 two steam hopper barges were provided. 



What the ordinary buoys and beacons concerns, consi- 

 dering their quantity it might be convenient to have them 

 made by private contractors so that they will be promptly 

 ready for placing, and facilitate the execution of the works. 

 Time it will take Te plan of the work having been clearly explained, its 

 practical results might be doubted, specially with regard 

 of the deepening of the shallow places. 



It has been observed when describing the River Uruguay 

 and the different bad bars, which are an obstacle to navi- 

 gation, that the river has a very reduced slope and that its 

 banks are firm. The shallow places with their details of 

 orientation and depth have remained the same, as has been 

 proved by comparing different surveys made before, with 

 those made by this Commission. 



The cause of the relative stability of the shallow places 

 and specially of these where the direction of the current is 

 always the same, is the great adherence and conglomera- 

 tion between the materials, which is so great that the suc- 

 tion dredger of this Commission is not able to lift them, 

 though the velocity of the water in the suction pipe is 3,50 

 meters per second. 



It is therefore expected that the canalization of the bars, 

 which are in these conditions, when executed, will be of 

 easy maintenance. They represent more than half the cube 



to canalize the 

 river. 



