19W.J 



HAUFT — THE MISSISSIPPI RIVEH PROBLEM. 



93 



time (or over $1,500 per acre), so that the cost would have been 

 prohibitory. This one deposit, withdrawn from the river, averaged 

 about 35,000,000 cubic yards annually ; and as the total amount of 

 sediment carried to the Gulf has been estimated by Humphreys and 

 Abbot at 275,000,000 yards, it represents thirteen per cent, of the 

 whole, while the annual deposit at Cubit's Gap is five per cent., 



^A-etc/r •s/ro^77Ti'- Be;rer^^s of 



^/- Cliirs Gop <3-0 S9 ;ff7s 





''*li A LOUT/IC 



//3 <ff 7>t 



<r.y. eac/t yeoc?-^ i^Aic/,, eg, /J 

 yaict J^or fftt 30 years, tvc 





DELTA OF 



making about one-sixth of the sediment which is thus withdrawn 

 by these crevasses, with consequent benefit to navigation, reduction 

 of flood height and increase of the public domain, all without 



cost.^ 



It would therefore seem that these lateral outlets have very much 



1 The depth of three yards was obtained by taking the average of a number 

 of soundings covering the areas filled up by the crevasses (S.7 ft.)- 



