

IMPROVEMENT OF RIVER OUTLETS. 131 



it possible to save large sums of money by lowering the height of the jetties, and by 

 utilizing the enormous deposits made by the river to themselves do much of the con- 

 traction which would otherwise have to be done by very expensive jetty construction 

 The one unfavorable factor in the problem, the exceedingly yielding nature of the 

 foundation which the mud flats of the locality afford, has been dealt with by the Board 

 by a systematic effort to reduce the weight of the necessary structures to limits corre- 

 sponding with the small supporting power of the mud." 



