PORTLAND CEMENT CONCRETE ROADS. 57 
Item Operation. 
Coarse aggregate Number of cubic yards including waste. 
Cost per ton at pit or quarry. 
Cost per cubic yard at pit or quarry. 
Freight per ton. 
Freight per cubic yard. 
Hauling cost per cubic yard. 
Estimated demurrage $ , divided by total yardage gives cos 
per cubic yard. 
Rehandling from stock pile per cubic yard. 
Total cost per cubic yard on job. 
Surfacing - - Preparation of subgrade. 
Cost of joint material on job. 
Cost of reinforcing metal on job. 
Labor, mixing, and placing concrete, including engineer, fireman, 
form setters, fine graders, wheelers, shovelers, cement men, pud- 
dlers, baling and sorting sacks, curing, covering, uncovering, finish- 
ers, water boy, watchmen, pump man, barricades, and lights. 
Cost of hauling mixed concrete, including fuel, and depreciation on 
hauling eqmpment. 
Water supply and pumping, including labor, connecting pipe, setting 
pump, fuel for pump, disconnecting pipe and drilling well. 
Mixer supplies, fuel and oil only. 
Miscellaneous supplies, such as boots, hardware, etc. 
Camp loss - - Including loss on board of men on operating days as well as on idle 
days, loss on full-time men not included in overhead, etc. 
(Do not include depreciation on camp equipment.) 
Miscellaneous costs (a) Cost of hiring and shipping in men. 
(b) Water rent. 
(c) Rent of grounds and buildings. 
(d) Cost of building cross-overs. 
Contingencies Delays due to railway embargoes, strikes at pits, quarry, or jobt 
material plant breakdown, machinery breakdown, failure of water 
supply, unusually bad weather, freezing of pipe line, etc. 
Compensation and public liability 
insurance 
Bond cost Personal or surety bonds. 
Overhead Per cent manager's yearly salary. 
Per cent yearly salary of stenographer and clerk. 
Per cent yearly salary material man and timekeeper. 
Per cent yearly expense of manager, including railway fare, hotel 
bills, bidding cost, auto, etc. 
Per cent yearly office rent. 
Per cent yearly office telephone and telegrams 
Per cent office supplies, miscellaneous. 
Corporation insurance. 
Interest on working capital not otherwise included 
Association dues. 
Profit 
Charges for machinery and equip- 
ment ._, 
For the benefit of those who may desire to have some idea of the 
cost of concrete pavements, a table has been prepared showing the 
weighted average cost per square yard and per mile of all Federal- 
aid concrete pavements contracted for or constructed in each of the 
States during the years 1919 and 1920. The costs per mile are based 
on a uniform width of 18 feet. The figures given are for the con- 
