. Electric railway journal . DETROIT TUNNEL MAINTENANCE—PLAN AND PROFILE OF TUNNEL AND APPROACHES March 18, 1916] ELECTRIC RAILWAY JOURNAL 529. DETROIT TUNNEL MAINTENANCE SIGNAL TOWER AND EMER-GENCY INSPECTION SHED IN WINDSOR YARDS being regularly in operation five double-crewed enginesthat work twenty-four hours a day and two that areoperated only for one shift daily. Of the remainingengines one serves as a spare to take the place ofwhichever road locomotive is turned in for regular in-spection, and the other two are stand-by machines thatcan be used during periods of abnormally heavy traffic


. Electric railway journal . DETROIT TUNNEL MAINTENANCE—PLAN AND PROFILE OF TUNNEL AND APPROACHES March 18, 1916] ELECTRIC RAILWAY JOURNAL 529. DETROIT TUNNEL MAINTENANCE SIGNAL TOWER AND EMER-GENCY INSPECTION SHED IN WINDSOR YARDS being regularly in operation five double-crewed enginesthat work twenty-four hours a day and two that areoperated only for one shift daily. Of the remainingengines one serves as a spare to take the place ofwhichever road locomotive is turned in for regular in-spection, and the other two are stand-by machines thatcan be used during periods of abnormally heavy traffic. Inspection Facilities for Locomotives For the inspections, which are given to each engineat ten-day intervals, there is provided a small steel andconcrete building in the yard at the Detroit end of thetunnel. This is approximately 140 ft. x 32 ft. in dimen-sions and it will hold three locomotives has a single longitudinal track along one side. A pitis provided for the whole length of the track, and this,it may be said, was very successfully built upon a gravelfill, which was introduced because suitable foundationmaterial


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