32 



BULLETIN 155, U. S. DEPARTMENT OF AGRICULTURE. 



Writing again seven years later, Mr. Carroll repeats that one man 

 on each of these lines is all the labor required, the inspections being 

 made about once a week, and he says : 



I attribute our low cost of maintenance to the careful and frequent inspec- 

 tions we make of the lines. 



The cost of repairs on the 12 miles of conduit at Astoria, Oreg., 

 for 10 years after its construction is given by A. L. Adams as 

 follows : * 



Cost of repairs on 12 miles of conduit. 



Year. 



Cost. 



Year. 



Cost. 



Year. 



Cost. 



Year. 



Cost. 



Year. 



Cost. 



1895 



S10S.58 

 15.90 



1897 



1898 



S63. 67 

 65.50 



1899 



1900 



S46.10 

 71.59 



1901 .. 



S243. 18 

 314. 03 



1904 



S350 18 



1896 



1902 



895. 10 



The foregoing figures include the expense of repairing the damage 

 resulting from two landslides. Aside from this, most of the cost 

 was charged to the 7| miles of wood pipe. The total cost of repair- 

 ing 27 perforations which occurred in the steel pipe in 1902, 1903, 

 1904, and 1905 was $297. 



For repairing staves in 48-inch pipe near Clarkston, Wash., in 

 January, 1912, R. A. Foster, engineer and manager, Clarkston system 

 of Lewiston-Clarkston Improvement Co., gives the following detailed 

 cost data : 



Cents. 



Milling staves 3.04 



Hauling, 182 ton-miles, at 37.09 18.24 



Removing old pipe 3. 24 



Repairing old bands 2.43 



Subdelivery of material 5. 77 



Laying 9. 12 



Replacing bands, 555, at 8.11 cents per band 12. 16 



Cook - 3. 04 



Food, 71 cents per ration _ 13.42 



Lost time of men 4. 73 



Lost time of team 1.92 



Piling of old lumber saved 1.73 



Superintendence 4. 83 



Cost of lumber, $28 f. o. b. Lewiston 81. 20 



Total 164. 87 



Making total cost per foot, $1.65. 

 Wages of men, 25 cents per hour. 



1 Trans. Amer. Soc. Civ. Engin., 58 (1007), p. 69. 



