32 



Her\ idero bar. 



Western route 

 6 feet. 



Eastern route 

 S feet. 



Projected works. 



Marking of the 

 channel. 



center of the river, till the arroyo «Hervidero» is reached. 

 where the bottom formed by rocks begins. 



The extension of the «Hervidero» bar is about 3.800 me- 

 ters, the principal shoals existing in the very center of the 

 liver ( Sheets C and C )■ 



In order to avoid those rocks, navigation at present 

 follows the Argentine shore, the direction being indicated 

 by two buoys placed by the riversteamer Companies and 

 The Oriental Government. The number of those buoys is ge- 

 nerally three, which are situated in the upper part of the 

 bar; the first and the last are left to the West and the se- 

 cond one, which marks a great shoal which is visible when 

 the river is very low, is left to the East. Following the des- 

 cribed direction 6 feet of water will be found when the 

 river is very low, but the bar can also be passed leaving 

 the geat shoal to the West and in this case the maximum 

 depth found is 8 feet. 



The last named direction, which is known by the pilots, 

 is at present not used, not only for being more curved than 

 the other but also because the navigability of this part of 

 the river depends on the «Chapicuy» bar where there is only 

 2 V 2 feet of water under the same condition wdien the river 

 is low. 



However it may become useful some day Avhen the other 

 bars that of Chapicuy» included, have been deepened, but 

 it will then be necessary to explore it first carefully in order 

 to extract some loose stones, which are supposed to exist, 

 besides buoying it. 



In order to make this bar navigable in conditions of per- 

 fect safety, a nine feet channel in the center of the river has 

 been projected, which can he marked by signals placed in 

 its direction on the Argentine shore. 



The greatesl attention has been given to the marking of 

 this bar, so that vessels may cross it during day and night 

 with complete safety. 



At present the steamers leave the docks of Buenos Aires 

 at Hi o'clock a. in. with the object to arrive the next after- 

 noon at Concordia andSalto, where the operation of loading 

 and unloading are immediately carried out, in order thai 

 they may be able to undertake the return voyage next day. 



