TABLES i} 
TABLE 30. THE PROBABLE USEFUL LIFE OF VARIOUS 
ARTICLES (Continued) 
Description. wig Revdual) Authority. Remarks. 
Years 
Paving (continued) 
asphalt, LL) lated 12 Wis. R. R. Com. Milwaukee E. R. & L. Case. 
brick... hn CTLs ne 12 Wis. R. R. Com Milwaukee E. R. & L. Case. 
cobble | oul i 25 Chi. U. T. Co. Chi. Union Trac. Co. Case. 
cobble, [Ca,L alls als 26 Stone & Webs. Chi. Union Trac. Co. Case. 
creosoted blocks........... 12 Wis. R. R. Com Milwaukee E. R. & L. Case. 
granite... 0 ga 16 Chi. U. T. Co. Chi. Union Trac. Co. Case. 
granite, oN on Ld 16 Stone & Webs. Chi. Union Trac. Co. Case. 
granite. ........ Liou oy Wis. R. R. Com. Mil. El. Ry. & Lt. Co. Case. 
Pipe 
water pipe: 
castiron................. ns Kiersted Galena Appraisal, Kan., 1905. 
cast fron. ls. Lil ial A es Williams Galena Appraisal, Kan., 1905. 
castiron... i... ....... 0 yon Burdick Mt. Vernon W. W., Ill., 1906. 
eastaron., lu lvl ron Dodge Mt. Vernon W. W., Ill., 1906. 
castro, LLL yon Alvord Proc. Am. W. W. Assoc., 1903. 
cast iron mains............ 50-75 Metcalf Trans. Am. Soc. C. E., 1909. 
cast iron mains............ 100 Cal. R. R. Com San Jose Water Co. Case, 1914. 
cast iron, small size........ 20-40 Metcalf Trans. Am. Soc. C. E., 1909. 
wrought iron. ......... 000 20 Kiersted Galena Appraisal, Kan., 190s. 
wrought jron.......... ... 20 Dodge Mt. Vernon W. W., Ill., 1906. 
wrought iron underground’ 30 Williams Galena Appraisal, Kan., 190s. 
wrought iron services...... 15-30 Metcalf Trans. Am. Soc. C. E., 1909. 
galv.wroughtironincl.fit's. 30-50 Foster ‘*“ Eng. Valuation,” etc. 
black w. iron and services, 25-35 Foster ** Eng. Valuation,” etc. 
steel pipe................. B25-50 Metcalf Trans. Am. Soc. C. E., 1909. 
Services... ol ol 20 Dodge Mt. Vernon W. W., Ill., 1906. 
wood-stave... lL ily 20-30 Metcalf Trans. Am. Soc. C. E., 19009. 
wood-stave.......... . 000 30 S.J.L.&P. Cor. Cal. R.R. Com. rate hearing, 
distributing system. ...... 16.5 Cal. R. R. Com Cuyumaca Water Co. Case. 
power-plant pen stocks... . 30 S.J]. L.&P. Cor. Cal. R. R. Com. rate hearing. 
gas pipe: 
w. i. & steel under3” diam. 20 Wis. R. R. Com. Quoted by H. A. Foster. 
w. iron & steel 3” and over 30 Wis. R. R. Com. Quoted by H. A. Foster. 
c. iron mains 3” & 4” diam. 50 Wis. R. R. Com Quoted by H. A. Foster. 
cast iron mains over 6”... 5 Wis. R. R. Com Quoted by H. A. Foster. 
Services. ..... lls Mon Wis. R. R. Com Quoted by H. A. Foster. 
miscellaneous: 
pipe and covering........ a I5 Chi. U. T. Co. Chi. Union Trac. Co. Case. 
pipe and covering. FPR Arnold Coney Isl. & Brooklyn Case. 
pipe and covering.........| 20 Stone & Webs. ~~ Chi. Union Trac. Co. Case. 
pipe and covering........." 20 Wis. R. R. Com Milwaukee 3¢ Fare Case. 
pipe and covering......... 20 Floy 3rd Ave. Case, N. Y. City. 
pipe and covering......... 28.5 Arnold 4 Chicago Appraisals. 
pipe and covering. ........ 22-25 Trac. Val. Com. Chicago Con. Trac. Co. Case. 
power stations............. 20 P. G.&E. Co. S.F. rate hearings, 1913-14. 
DOES, Sls bi 0 | % Chi. Tel. Com. Chicago Telephone Com. 
wooden... . 00 10 Arbitrators Ata. St. Lgt. Controversy, 
wooden, [0nd 13} Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
wooden in earth. ......... 12-18 Wis. R. R. Com Quoted by Henry Floy. 
AZ