. Handbook of construction plant, its cost and efficiency. sate^KSirf Fig. View of 30-in. Hydraulic Dredge Francis T. Sim-mons in Operation in Lake Michigan. COST OF OPERATION AND REPAIRS OF DREDGE, 1910;TOTAL TIME IN COMMISSION, 4,320 HOURS Operation. Totals. Labor $13, Fuel 17, Supplies, tools, sleeves, oil, etc 4, Commissary labor and supplies 6, Field repairs, labor and material 6, Tug service 13, Derrick service Motor boat Insurance 3, Winter repairs and fitting up: Labor .. . 5, Material 2, Fuel commissary and tools 1,02
. Handbook of construction plant, its cost and efficiency. sate^KSirf Fig. View of 30-in. Hydraulic Dredge Francis T. Sim-mons in Operation in Lake Michigan. COST OF OPERATION AND REPAIRS OF DREDGE, 1910;TOTAL TIME IN COMMISSION, 4,320 HOURS Operation. Totals. Labor $13, Fuel 17, Supplies, tools, sleeves, oil, etc 4, Commissary labor and supplies 6, Field repairs, labor and material 6, Tug service 13, Derrick service Motor boat Insurance 3, Winter repairs and fitting up: Labor .. . 5, Material 2, Fuel commissary and tools 1, Tug service Totals: Operation 65, Repairs 9, Operation and repairs $74, Per Per. hr. cu. yd. $ $ .0300 .0076 .0104 .0106 .0238 .0757 .0005 .1352 .0010 .8102 .0060 .0093 .501 .0037 .2374 .0018 .1743 .0013 .1142 .0161 $ $ taw- <D00 ooaoor-Joi. SO 0° OOOO3 ^on S- wCO 0 DREDGES 227 The operating crew of the dredge is as follows: Per mo. 1 Chief operator $ 1 Assistant operator 1 Chief engineer 1 Assistant chief engineer 4 Oilers 4 Firemen 4 Coal passers 2 Spudmen 1 Janitor 8 Deckhands Commissary : 1 Steward 1 Second cook 1 Porter The following data are for the year 1911 : V. TIME REPORT OF DREDGE, 1911 Available working time, hours 4,620 Pumping time, hours 3,288% Pumping time, percentage of total Delays: . Hours. Weather, , or 288 Miscellaneous, , or 1,043% Total delays, , or 1,331% The best months work was in November, when the workingtime efficiency was per cent. The dredge was started forthe year on April 15, during which month the working time was65 per cent of the total. The dredge went out of commissionNovember 30. The working season, then, was 7% months, per cent of the year. In calculating interest c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbuilding, bookyear191
