. Railroad structures and estimates . ARRANGEMENT OF TIESWhen depth of cover is less than 1 6. Fig. 40. C. P. R. Triangular Concrete Pipe. 142 CAST-IRON CULVERTS. TABLE Cost of Installing Three Types of Culverts. 4J Top of C. to B. of R. Items. Supporting track Excavation and backfillCulvert material Handling, laying, storecharges and hardware End walls Rip-rap and paving Contingencies Total cost 24 tri. con. pipe. 45 cu. lin. ft. 3 cu. yds. $ 24-in. cast-iron pipe. $ $55 40 171 38 29 40 cu. lin. ft. $330 2 ft. X 2 ft. wood box. 60 cu. y
. Railroad structures and estimates . ARRANGEMENT OF TIESWhen depth of cover is less than 1 6. Fig. 40. C. P. R. Triangular Concrete Pipe. 142 CAST-IRON CULVERTS. TABLE Cost of Installing Three Types of Culverts. 4J Top of C. to B. of R. Items. Supporting track Excavation and backfillCulvert material Handling, laying, storecharges and hardware End walls Rip-rap and paving Contingencies Total cost 24 tri. con. pipe. 45 cu. lin. ft. 3 cu. yds. $ 24-in. cast-iron pipe. $ $55 40 171 38 29 40 cu. lin. ft. $330 2 ft. X 2 ft. wood box. 60 cu. F. B. M. $25 M.) $55 60 100 40 25 Comparative Cost or Installing Three Types of Culverts. 20 Top of C. to B. of R. Items. Supporting track Excavation and backfillCulvert material Handling, laying, storecharges and hardware End walls Rip-rap and paving Contingencies Total cost 30 in. con. pipe. 225 cu. lin. ft. 5 cu. yds. $ $150225116 75501561 $692 30-in. cast-iron pipe. 220 cu. yds. 84 lin. ft. $ $150220513 92 SI 050 2 ft. X 4 ft. wood box. 250 cu
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