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 :1 
Cost of repairs on 12 miles of conduit. 






Year. Cost. Year. Cost. Year. Cost. Year. Cost. Year. Cost. 
1S eae $108258%|| 1897-2 =. $63.67.|| 1899-. =F $46.10 || 1901......- $243: 18 || 1903225 = $350. 18 
Ie Dsegacae 152 90))} | 1898 ooo 65.50 || 1900.....-- SOOT | PLS0 Ze ee ners 314503 |||) 1904.22 --5- 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 74 miles of wood pipe. The total cost of repair- 
ing 27 perforations which occurred in the steel pipe in 1902, 1908, 
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 
Malin > eStAVeS i= =. == 2-2 = ee eee 3. 04 
Hauling, 182 ton-miles;..at 37.092. =2- =.) 2 eS eee 18. 24 
Removine Old: pipe.-2-— - = ee ee eee 3. 24 - 
Rep AINe7Olds (PANGS * = 22 528 a ae a ee ee eee spe ED aA 
SHpdelivery of -Material- . Wa ee TEL 
ayn ee A ee ee ee ee ee 9.12 
Replacing bands, 555, at 8.11 Cente p per bands#2 >) eee 12.16 
WOOkMe ss or FPS a ee ee ee ee eee 3. 04 
Hood, (1 cents per ration =. .2-2 = a= eee ee 13. 42 
[ost dime of Men 2! 2 = 2 ee ee eee 4.73 
(OStebiMesOL (Led a ee ee 1. 92 
Piling of old lumber saved: = 2) = ==) eee ee leniGs 
Superintendence 2235222. 2.5 a ee eee 4, 83 
Gost of dumber, $28 f. 0: b. Lewiston 22=2 22) 81. 20 
Mota... 2 ee a eee 164. 87 
Making total cost per foot, $1.65. 
Wages of men, 25 cents per hour. 
—. 

1Trans. Amer. Soc. Civ. Engin., 58 (1907), p. 69. 
