Broken stone for contact beds or at per cu. yd. │ │ for filters │ │ Broken stone for sludge beds at per cu. yd. │ │ │ │ _Valves_ │ │ │ │ Gate valves, Fig. 13 at each │ │ Flap valves, Fig. 16 at each │ │ Slide valves, Fig. 11 at each │ │ Wooden slide valves at each │ │ Sludge valves, Fig. 10 at each │ │ │ │ _Tools_ │ │ │ │ Shovels, long or short handled at each │ │ Picks at each │ │ Wheelbarrows, wooden or steel at each │ │ Sieves for screening sand and at each │ │ gravel │ │ Saws, hammers, and axes Total amount │ │ │ │ _Lumber_ │ │ │ │ For sheeting and bracing; rough at per 1000 ft. B.M.│ │ lumber │ │ For forms for concrete work, sized at per 1000 ft. B.M.│ │ For runways, staging and mixing at per 1000 ft. B.M.│ │ boards, plank │ │ │ │ _Hardware_ │ │ │ │ Nails for forms, staging, etc. at per 100 lbs. │ │ Bolts or wire for concrete forms at per lb. │ │ │ │ _Iron Work_ │ │ │ │ Manhole frames and covers at per lb. │ │ Steps for manholes at per lb. │ │ │ │ _Siphons_ │ │ │ │ Flushing siphons for dosing tank at complete │ │ Timed siphons for emptying contact at complete │ │ beds │ │