COST DATA 269 



"The cost for repairs has been almost nothing. 



" The entire cost of running the whole plant, including interest 

 on valuation, for the month of September last was approximately 

 $1400." 



The work of the dipper dredge No. 4 of the Atlantic and Gulf 

 Coast Canal and Okeechobee Land Co. is taken from the official 

 report for the month of April, 1890. The machine was built by 

 the Osgood Dredge Co., of Albany, N. Y.; the hull was 90X35X9 

 ft. with spuds 20X20 in. The boom was 50 ft. long and the dipper 

 of 3J cu.yds. capacity. 



LOG OF DREDGE No. 4, FOR MONTH OF APRIL, 1890 



Days worked (12 hours) 21 



Number of crew 6 



Length of cut, iu feet 2,747 



Width of cut, in feet (average) . 50 



Fuel, 62 cords wood $124 . 00 



Payroll 239.66 



Provisions 59 . 1 1 



Supplies 33.49 



Depth of cut, in feet (average). 11 Repairs 46 . 17 



Freight 13.02 



Incidentals 35.90 



Cubic yards dug in month .... 55,957 



Average per day 2,664 



Maximum per day 3,809 



Total cost for month $551 . 35 



Cost per cubic yard . 99 of 1 cent. 



Material: Cypress swamp, muck, and sand with rock at bottom of cut. 



IV 



The cost of deep-water dredging with a clamshell dredge for 

 the Stony Point extension of the Buffalo, N. Y., Breakwater, was 

 given by Mr. Emile Low, M. Am. Soc. C. E., in Engineering News, 

 of October 11, 1906: 



"It may be of interest to the profession to state the cost of the 

 deep-water dredging with a very large clamshell dredge which 

 was done some years ago on the Stony Point extension of the Buffalo, 

 N.Y., breakwater. 



"The extension consists of two breakwaters, one 9989 ft. long 

 and the other 2803 ft. long. The longer structure is made up of 

 two parts, the rubble mound section (stone breakwater), 7250 ft. 

 long, and the timber crib section (South Harbor section), 2739 

 ft. long. 



"The Stony Point timber-crib breakwater, with the exception 

 of a few hundred feet next the shore, stands upon an artificial f ounda- 



