22 BULLETIN 660, U. S. DEPARTMENT OF AGRICULTURE. 



COST DIVISIONS— Continued. 



Road part. Operation. Cock. 



Roadway— Con tinned . 



Top course Laying (brick 1 27-34 



Top course Rolling (brick ) 27-56 



Top course Grouting 27-27 



Top course Curing concrete 27-11 



Miscellaneous Cleaning 29-06 



Ditches and drains: 



Ditches and gutters Excavating, common 30-17 



Ditches and gutters paved Forming 31-25 



Ditches and gutters paved Loading and hauling 31-36 



Ditches and gutters paved Mixing and placing 31-39 



Ditches and gutters paved Finishing 31-24 



Ditches and gutters paved Curing concrete 31-11 



Tile drains Excavating, common 33-17 



Tile drains Laying 33-34 



Tile drains Loading and hauling 33-36 



Tile drains Tamping 33-65 



Tile drains Back filling 33-01 



Catch basins Excavating, common 34-17 



Catch basins Loading and hauling 34-36 



Catch basins Laying (brick) 34-34 



Bridges and culverts: 



Foundations Coff erdaming 40-09 



Foundations Cribbing 40-10 



Foundations Excavating, common 40-17 



Foundations Excavating, wet 40-21 



Foundations Forming 40-25, 



Foundations Loading and hauling 40- 



Foundations Pumping 40-51 



Foundations Pile driving 40-45 



Foundations Mixing and placing (concrete) 40-39 



Foundations Back filling 41-01 



Abutments Loading and hauling 41-36 



Abutments Laying (masonry) 41-34 



Abutments Pumping 41-51 



Abutments Quarrying (masonry) 41-52 



Piers and bents (Same operations as abutments) 42- 



Superstructures .Blacksmithing ■ 43-02 



Superstructures Building false work 43-05 



Superstructures Curing concrete 43-11 



Superstructures Finishing 43-24 



Superstructures Forming 43-25 



Superstructures Loading and hauling 43-36 



Superstructures Mixing and placing (concrete) 43-39 



Superstructures Placing steel 43-47 



Box culverts Excavating, common 44-17 



Box culverts Loading and hauling 44-36 



Box culverts Form ing 44-25 



Box culverts Mixing and placing 44-39 



Box culverts Curing concrete 44-11 



Pipe culverts Back filling 45-01 



