. Baltimore and Ohio employees magazine . ley isquite narrow, with steep sides, and inorder to place the new line outside thelimits of theflood basin, itwas necessary toconstruct it onthe hillsides tothe west, withan elevation ap-proxima t elytwenty-five feetabove the oldroadbed. In construct-ing the new lineit became neces-sary to attainthe elevation ofthe Taylorsvilledam withoutcreating an im-practical gradi-ent, and to dothis the foot ofthe approach iscarried back toa point aboutone mile northof Dayton, orabout six andone - half milesfrom the will give aruling gradientof per ce
. Baltimore and Ohio employees magazine . ley isquite narrow, with steep sides, and inorder to place the new line outside thelimits of theflood basin, itwas necessary toconstruct it onthe hillsides tothe west, withan elevation ap-proxima t elytwenty-five feetabove the oldroadbed. In construct-ing the new lineit became neces-sary to attainthe elevation ofthe Taylorsvilledam withoutcreating an im-practical gradi-ent, and to dothis the foot ofthe approach iscarried back toa point aboutone mile northof Dayton, orabout six andone - half milesfrom the will give aruling gradientof per cent,compensated forcurvature. Thenecessary eleva-tion is reachedat the Taylors-ville dam andcontinues thesame until thenew line inter-sects the old nearTippecanoe ofthis approachnecessitates theraising of bridgeNo. 3 over theMiami River at North Dayton about seven feet, togetherwith Leo Street yard and the NorthDayton connection. The constructionof the relocated line at a higher ele-vation on the hillsides results in_^ a. 16 THE BALTIMORE AND OHIO EMPLOYES MAGAZINE series of short cuts and fills, as theprofile mdicates. The relocation involves the excavationof 850,000 cubic yards of material, dis-tributed, with the exception of one largecut of 135,000 cubicvards and one rock cutof 80,000 cubic yards,among a great manyrather small cuts. Workhas been handled byvarious methods, amongthem being excavatinggrader and team; 70-CBucyrus shovels withnarrow gauge cars; andrevolving Erie shovelswith teams. At Taylorsville aninety-two foot rein-forced concrete arch forcrossing of the relocatedNational Highway hasbeen constructed, con-necting with the top ofthe dam, upon which theNational Highway willrun. This structure is acombination of the openspandrel and suspendedfloor types and is two-ribbed and three-hinged. As has been mentioned,the ground line is veryirregul^,r, making neces-sary many openings forwaterways, which areprovided for by concretepipes and culverts. There
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbaltimo, bookyear1912
