- 24 — 



ring the period of a low river cause great loss to navi- 

 gation, 

 slopes. During the floods, the current is excessive, specially from 



Nueva Escocia to Concordia the mean slopes being 6 cen- 

 timeters and the maxima being from 7 to 9 centimeters 

 per kilometer. 

 velocities of The greatest velocities of the current observed at the 



ports of Concepcion del Uruguay, Colon and Concordia 

 were 1,45, 1,80 and 2,20 meters per second, corresponding 

 respectively to riverheights of 5,49, 8,55 and 12,56 meters. 

 Tides. The tides propagate with the same mean height to the 



Port of Colon as they do at Concepcion del Uruguay; the 

 ordinary tides reach to the Chapicuy bar and extraordi- 

 nary as far as the Port of Concordia. 

 stretch ofconcq,- In front of Concepcion del Uruguay the river has an 



cion del Uruguay. . . „ - , . 1 



ample channel with a minimum deptli oi 20 teet, which 

 forms a splendid roadsstead 7 kilometers long by 700 me- 

 ters wide, which extends as far as the extreme South of the 

 «Almiron» island (Sheet N). 



At this point the river divides itself into two principal 

 arms. In the Eastern arm, at the foot of the blufs, the 

 channel maintains a great deptli as far as the slaugh- 

 terhouses «Casas Blancas: after which the depth decreases 

 to 6 feet so that during a low river this arm is only navi- 

 gable to the mentioned slaughterhouses ( Sheet M ). 



The Western arm which is used by the general naviga- 

 tion, divides itself again into two arms, one near the Ar- 

 gentine coast and the other near the Oriental island ( «A1- 

 miron Chico» ) pass; both have a depth of 1.1) feet, but the 

 latter one is generally preferred as its navigation is 

 easier. 



Doth last named channels unite again into a single one, 

 which is wide and deep till the bar of «Ahniron Grande» 

 has been readied. 



This bar, where there was before only a depth of 8 feet at 

 wry low river, has. as has been stated before, been dredged 

 to 15 feet. Of this has remained a depth of 10 feet, so 

 that at present it is no longer an obstacle to the naviga- 

 tion of the great river steamers. 



It is however not yet marked, which can be effeciently 



