232 



A TREATISE ON DREDGES AND DREDGING 



"The costs given cover the operating expenses, the cost of all 

 repairs necessary to keep the dredges in first-class working condition, 

 and the cost of extraordinary breakages and accidents ; all of which 

 latter are properly included in dredging costs. Estimates of costs 

 which do not include the last-mentioned items are to that extent 

 fictitious. 



1. "A dredge having 3J cu.ft. buckets, digging in ordinarily 

 loose gravel and sand. 



OPERATING COSTS IN CENTS PER CUBIC YARD 



2. "A 5 cu. ft. dredge, working in tight gravel and clay. The 

 material should properly be considered as tough rather than hard. 



OPERATING COSTS IN CENTS PER CUBIC YARD 



"Dredge No. 2, working in such -round as is Xo. J, would opera te- 

 at a total cost of about 5.59 cents." 



