ANNEX 



Short description of the studies and works 



which have been carried 



out during the years 1902 and 1903. 



BAR. 



MIDDLE URUGUAY 



A precise levelling carried out from Buenos Aires To 

 Conception del Uruguay and from there to Concordia has 

 affirmed the approximative results obtained by the studies 

 of the propagation of the tides in the Uruguay River, which 

 showed that the slope at a low river is small and that 

 the river, even during the months of extraordinary low 

 water, is navigable as far as the last named port. 



In accordance with the proyect for the improvement of S an francisco 

 the Uruguay River, the dredging of the San Francisco Bar. 

 the first of the many which obstruct the river navigation to 

 Concordia was started. 



In this bar, the low pan of which is formed by gravel 

 and the upper by sand, a channel has been opened inn mts. 

 wide and 2000 nits. long. After it had been dredged for the 

 first time, some unimportant silting has taken place in its 

 superior part, where the bottom consists of fine sand, 

 which has been removed since. At present there are 9 feel 

 of water at this bar at extraordinary low water, whereas he- 

 fore its dredging, there were only 5 feet. The formation 

 of the channel through this bar lias been completed by 

 marking it with 2 towers in line on shore, which are Lighted 

 during night, and 4 ordinary buoys. 



