. Baltimore and Ohio employees magazine . e 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. Thereare four arches for high-way and waterway un-dercrossings, varying inspan from twelve to thirtyfeet, the largest of whichis for Poplar C
. Baltimore and Ohio employees magazine . e 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. Thereare four arches for high-way and waterway un-dercrossings, varying inspan from twelve to thirtyfeet, the largest of whichis for Poplar Creek, witha span of thirty feet. In accordance withagreement with theMiami Conservancy Dis-trict, the Baltimore andOhio is furnished a likerailroad line on the relo-cated grade, in Heu, of itsold line, which will beturned over to the dis- trict thirty days after operation of therelocated line has commenced. The Balti-more and Ohio will pay the district forany betterment in the new line over theold, which consists principally of decreased. THE BALTIMORE AND OHIO EMPLOYES MAGAZINE 17 gradient and curvature, together withheavier track. Sub-grade for secondmain track has been completed at the ex-pense of the Railroad, but the secondmain will not be built at the present time.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbaltimo, bookyear1912
