. Electric railway review . Boston andCambridge has recently been opened to street car and vehicu-lar traffic. This bridge is also designed to carry trains fromthe elevated division of the Boston Elevated Railway. Con-struction work on this structure began in 1901. Reference tothe illustration will indicate that provision has been madeat the center of the structure for two tracks to accommodateelevated trains. These tracks are fenced in from the restof the bridge. On either side of the elevated tracks are thetracks accommodating the surface cars of the Boston ElevatedRailway. On the new bridge
. Electric railway review . Boston andCambridge has recently been opened to street car and vehicu-lar traffic. This bridge is also designed to carry trains fromthe elevated division of the Boston Elevated Railway. Con-struction work on this structure began in 1901. Reference tothe illustration will indicate that provision has been madeat the center of the structure for two tracks to accommodateelevated trains. These tracks are fenced in from the restof the bridge. On either side of the elevated tracks are thetracks accommodating the surface cars of the Boston ElevatedRailway. On the new bridge the elevated trains will leavethe elevated structure and reach the bridge floor level overabutments on the Boston side, passing across the bridge atthe same grade as the roadway. On the Cambridge side theelevated trains will pass into the new Cambridge subway. The length of the new bridge between abutments is1, feet. It contains 11 spans varying in length to feet. The total width of the bridge between. New Cambridge Bridge—Boston Approach, Showing Incline toConnect with Elevated Structure. sidewalk railings is 105 feet. It is essentially a high levelbridge, with 26 feet in the clear above high water. Piles for this bridge were driven, in some cases, to adepth of 60 feet below low Water, being cut off at two eleva-tions—one about two feet, the other about three feet, abovethe bottom of the concrete; 1-2-4 concrete was placed on topof the piles through the tube to five feet below low this concrete was built the regular granite piers. Some of the quantities involved in the construction ofthis bridge may be of interest. There are 80,000 yards ofdredging, 85,000 yards of concrete, 20,000 yards of granite,25,000 piles, barrels of cement and 8,000 tons of steelused in the construction. The approximate cost of the bridgeis 13,500,000. divided between the city of Boston and the cityof Cambridge, the Boston Elevated Railway Company payingfor
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
