Public works . cember 1, each locomotivecrane consumed about 5^ ton of coal per day, mak-ing a total of 120 tons at $ per ton. The opera-tion of the crane required one engine man at $ day and one fireman at $ a day, making thetotal labor cost for the year $2,496. The intereston the investment at 7 per cent is $, deprecia-tion on the cost price of $9,460 divided by 16 yearsis $, repairs and maintenance, including cables,$750, making the total operating cost for one year$5, The service performed by the ciane, namely un-loading five cars per day for 192 days is 950
Public works . cember 1, each locomotivecrane consumed about 5^ ton of coal per day, mak-ing a total of 120 tons at $ per ton. The opera-tion of the crane required one engine man at $ day and one fireman at $ a day, making thetotal labor cost for the year $2,496. The intereston the investment at 7 per cent is $, deprecia-tion on the cost price of $9,460 divided by 16 yearsis $, repairs and maintenance, including cables,$750, making the total operating cost for one year$5, The service performed by the ciane, namely un-loading five cars per day for 192 days is 950 carsor 42,200 tons, plus 20,400 tons handled from stor-age to bin, equals 57,600 tons at a cost of $ ton. It is estimated that the cost of the same workdone by hand w^ould be $.50 per ton or $28,800, thusshowing a saving of $23, made by each loco-motive crane, equal to $46, for the twoBrownhoists applied continually on the road workor a saving of cents per ton on the CONCRETING CULVERT WITHPORTABLE MIXER DIFFICULT ROCK EXCAVATTOisIN DARK HOLLOW CLETRACTOR HAULING OVER ROAD PUBLIC WORKS Vol. 52, No. 2 Up-to-date ConcreteRoad Construction Brief reports from recent work indifferent states. Contractors for concrete road constructionthroughout the United States have, during the pastfew weeks, sent to Public Works various dataregarding the magnitude and character of the workthey were engaged on. the requirements, conditions,difTcuhies encountered, equipment installed, methodsof construction, and efficiency and rapidity of these data, indicating special features orunusual results, will be presented in separate de-scriptive articles; others that may not present anyunusually important or novel features but are never-theless valuable as representative of current practiceor standard operations have been selected as de-scribing satisfactory results and reliable of them are here summarized. S
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
