THE OUTLOOK FOR TIMBER DEMANDS 



31 



TRENDS IN RAILWAYS 



TRACK MILEAGE 



500 



450 



5 400 



3 



o 



350 



300 











, r 



A 







-/ 



\ 



N 



-^^ 











r 







r 



OL 



1920 1930 1940 1950 



1960 



FREIGHT CARRIED 



800r 



700 



~ 600 



E 



c 

 o 



■^500 



o 



^400 



300 



200 















\i 



\A 







V 



VV. 



.A 









IT 



\v 



f 







V 







r 







T 



1920 1930 1940 1950 1960 





TIES USED 





4200 



3600 



J3OOO 

 -0 

 o 

 -S2400 



c 

 



"^1800 



1200 



600 

 n 



^- — ~\ 









1 



^ 



















V 



\ 







V 



\ 



\ 









\ 



' 









1920 1930 1940 1950 1960 



Figure 14 

 Table 19. — Railway mileage and crossties consumed, 1920-2000 





Mileage of track 

 operated 



Total 

 cross- 

 ties per 

 mile of 

 track 



Crossties consumed 



Period 

 or year 



Total 



In replacement 



In new track 





Total 



Laid on 

 crossties 



Number 



Volume 

 per tie 



Number 



Number 

 per mile 



Apparent 



average 



life 



Number 



Track laid 

 on cross- 

 ties 



1920-29 1... 



Thousand 

 400.4 

 399.9 

 378.3 

 369.8 

 360.6 

 357.9 

 354.5 



Thousand 

 372 A 

 371.9 

 351.8 

 343.9 

 335.3 

 332.9 

 329.6 



Number 



2,986 

 3,000 

 3,015 

 3,017 

 3,017 

 3,018 



Thousand 

 96,400 

 52,506 

 48,353 

 29,523 

 17,633 

 14,450 

 16,261 



Board feet 

 34 

 36 

 38 

 39 

 39 

 39 

 39 



Thousand 

 90,000 

 50,552 

 45,111 

 26,431 

 15,424 

 12,968 

 14,484 



Number 



Years 



Thousand 

 6,400 

 1,954 

 3,242 

 3,092 

 2,209 

 1,482 

 1,777 



Miles 



1930-39'... 

 1940-49 1... 

 1950-59 i_._ 



1960 



1961 



136 

 128 

 77 

 46 

 39 

 44 



22 

 23 

 39 



655 



1,080 



1,025 



730 



490 



1962 





590 









PROJECTIONS 



1970. 

 1980. 

 1990. 

 2000. 



340 







335 







330 







330 







316.0 



3,030 



312.0 



3,045 



307.0 



3,060 



307.0 



3,060 



28,030 

 28,340 

 28,250 

 28,250 



40 

 40 

 40 

 40 



25,300 



80 



25,600 



82 



25,500 



83 



25,500 



83 



38 

 37 

 37 

 37 



2,730 

 2,740 

 2,750 

 2,750 



900 

 900 

 900 

 900 



' Data shown are annual averages for the decade. 



Sources: MILEAGE OF TRACK OPERATED, 

 NUMBER OF CROSSTIES USED IN REPLACE- 

 MENT: U.S. Interstate Commerce Commission, Bureau 

 of Transport Economics and Statistics, 1920-53, Statistics 

 of Railways in the United States, 1954-62, Transport Sta- 

 tistics in the United States. 



MILEAGE OF TRACK LAID ON CROSSTIES, 

 CROSSTIES PER MILE, NUMBER OF CROSSTIES 



Interstate Commerce 

 for class I railroads. 



USED IN NEW TRACK: U.S. 

 Commission statistics (op. cit.) 

 adjusted for all railroads, _ 



AVERAGE VOLUME PER TIE: U.S. Department of 

 Agriculture, Forest Service, in cooperation with American 

 Wood-Preservers' Association, Wood Preservation Statistics. 



PROJECTIONS: U.S. Department of Agriculture, 

 Forest Service. 



