. Railroad structures and estimates . )lock of concrete, sup-ported on piles, where soft bottom is encountered and provisionis made for a stove and coal bin. A separate pit for gasolinetank is built of concrete with a wooden top, located in a suitableposition some distance from the pump house. The pit is drainedand is large enough to hold a 50 gallon tank. The house itselfis of the ordinary frame construction with 2 X 6 wood joistson cedar sills, finished on top with 2 in. plank for the floor; thewall studs are 2 X 4 at 2-ft. centers and the roof and ceilingtimbers 2 X 6. The roof is covered w


. Railroad structures and estimates . )lock of concrete, sup-ported on piles, where soft bottom is encountered and provisionis made for a stove and coal bin. A separate pit for gasolinetank is built of concrete with a wooden top, located in a suitableposition some distance from the pump house. The pit is drainedand is large enough to hold a 50 gallon tank. The house itselfis of the ordinary frame construction with 2 X 6 wood joistson cedar sills, finished on top with 2 in. plank for the floor; thewall studs are 2 X 4 at 2-ft. centers and the roof and ceilingtimbers 2 X 6. The roof is covered with |-in. T. & G. boardswith building paper and shingles over. The walls are doublelined with |-in. T. & G. boards and drop siding with building 468 WOOD pu:mp house. Shingles TI U U a Drop Siding T3 3. Soti:- ProjectioD of botts is girenfrom bottom of euca^B. I 7 ) ^N. i£ PLAN : T. Jk 0. PUak Fig. 217. C. L. O. & W. Ry. Pump House. 11 DAMS. 469 paper between. The cost of this type of house, without thepumping outfit, but including the foundation for the pump andthe gasoUne concrete pit. is about SoOO. Dams. — Dams for impounding water for gravity ser\iceaverage from 6 to 12 ft. in height, consisting usually of an earthembankment or such material as can be had conveniently nearthe location, or wood crib, or stone or concrete retaining wall. 8kipellii»


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