— 21 — 



The other channel follows, from its separation above the Principal channel. 

 « Tres Bocas » the Oriental coast and form the most im- 

 portant and deepest arm of this section of the river. It is 

 used by the general navigation of the river. 



It is connected to the «China» channel by various arms 

 as those called the « Colon the Solitaria », - Campichue- 

 lo » and « Cambacua ». 



It was this part of the river which offered the greatest ob- 

 stacles to the navigation of great draught, as there existed 

 sand bars where the depth was reduced to only 13 feet. 



At present part of these obstacles have been removed, 

 only some of less importance remaining'. 



They are the following : 



The bar of « Roman » with 16 feet of water at lowest The «Roman bar. 

 river, is situated in front of the c< Bonfiglio » island. The 

 extension is only 400 meters and in order to remove it and 

 to form a channel 17 feet deep by 200 meters wide a ma- 

 ximum quantity of only 15.000 meters cube has to be 

 dredged. 



The bar of -Banco Grande », where there was only a The Bar of Banco 

 depth of 13 feet, has been dredged to 18 feet and is mar- Grande - 

 ked as well during day - - as at night time by beacons 

 placed in the line of the course to be followed. 



The survey of the « .Montana > bar has already been The Bar of Mon- 

 carried out and a channel of 17 feet has been formed, but in 

 consequence of its sinuosity there is practically only a depth 

 of 16 feet. 



In order to straighten the channel and to bring its depth 

 to 17 feet over a width of 200 meters it will be necessarv to 

 dredge a cube of 90.000 M 3 . 



By decree of the 16 th of August 1901 its rectification 

 within a cube of 10.000 M 3 has been provisionally autorized. 



The channel has been marked at starboard side with 

 three buoys numbered 2. 4 and 6. 



The < Altos &Bajos»bar, which was a similar obstacle i 

 as the « Banco Grande* bar has been deepened and marked 

 by beacons in the same manner. 



Before arriving at this bar and a1 the mole of the pori 

 of Concepcion del Uruguay, there exist three places with a 

 depth of onhv 17 feet. 



tana. 



«Altos & Ba- 



