22 BULLETIN 660,, U. S. DEPARTMENT OF AGRICULTURE. 
COST DIVISIONS— Continued. 
Road part. Operation. Code. 
Roadway — Continued . 
Top course Laying (brick) 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-^5 
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 Forming 44-25 
Box culverts Mixing and placing 44-39 
Box culverts CuriDg concrete 44-11 
Pipe culverts Back filling 45-01 
