352 



The amount of excavation performed for each period of six months, 

 since the commencement of the work, was as follows : 



Cuhic yards. 



First six months, from June to December, 1 853, 92,8 1 1 



Second six months, from December, 1853, to June, 1854, 92,676 



Third six months, from June to December, 1854, 60,000 



Fourth six months, from December, 1854, to Juno, 1855, 12,713 



Total, ' 282,200 



In the work there have been used as material : 



Pounds. 



Iron — in lock gates, 141, 920 



in piers, 43,357 



in lock foundations, 1 6,993 



in repairs and miscellaneous work, 97,540 



Total, 299,810 



Or nearly 1 50 tons of merchant iron, besides many tons in machin- 

 ery, &c., not included. 



Cuhic feet. 



Square Timber — in piers, 98,851 



in lock foundations, , 76,664 



in lock gates, 6,720 



miscellaneous, (estimated,) 1 6,000 



Total, 197,235 



There have also been 1,305,000 feet (board measure) of lumber used 

 for miscellaneous purposes, 3,137 kegs of powder, and 9,240 lbs. drill 

 steel. 



There have been employed on the work at one time 1,600 men, 100 

 horses and 25 head of cattle. Also 25 sail vessels, for freighting, 4 

 chartered steamers and propellers, and 6 barges, which have carried 32,- 

 350 tons of stone, to say nothmg of timber and other materials. 



As to the quality of the materials, it is believed that they will aver- 

 age better than those of any government work in the country. ,Sorae 

 of the lock-gate work required white oak timber 42 feet long, 27 by 14 

 inches, and in some instances, two feet square. To show the difficulty 



