78 BULLETIN 440, U. S. DEPARTMENT OF AGRICULTURE. 



A long operation requires more permanent construction. The cost 

 also varies with the location, because the expense of transporting 

 material to some sites is a considerable item. Under normal condi- 

 tions the cost of the lighter double-band mills complete, exclusive of 

 pond and yard, is from $100,000 to $110,000. The heaviest and best 

 constructed mills cost from $130,000 to $145,000. 



One such plant recently constructed cost $145,000 complete "with 

 machinery, power plant, and buildings. The cost f. o. b. San Fran- 

 cisco, of the equipment contained in this plant was as foUows: 



Two carriages $4, 980 



Two edgers 2, 560 



Slasher (7 saws) 550 



Air lift trimmer (11 saws) 1, 125 



Live rolls, transfers, conveyors, 



chains, etc 18, 350 



Boilers, about 700 horsepower $7, 000 



Engine, 650 horsepower (28 by 48 



inches) 6, 000 



Two log kickers 1, 200 



Two log stops and loaders 735 



Log turner 1, 900 



Steam nigger 550 



Band mill (9-foot) 2, 350 



Band mill (10-foot) 2, 700 



In addition to this equipment, belts, saws, piping, and other mis- 

 cellaneous hardware were required at a cost of about $15,000 delivered 

 at the site. The itemized cost of a double-band mill aggregating 

 $100,000 is approximately as given below: 



Total 50, 000 



Machinery, including power 



plant $40, 000 



Miscellaneous supplies and hard- 

 ware 10, 000 



Lumber and timbers |9, 000 



]\'Iill foundations and boiler house. 7, 000 



Freights and delivery 10, 000 



Labor in construction 24, 000 



A machine shop of some sort is required at every double-band mill. 

 In it are handled heavy repairs to logging and mill equipment. The 

 cost of a well-equipped shop is about $10,000 or $12,000. The equip- 

 ment consists of 2 or 3 lathes, 1 or 2 planers, 2 drills, 1 bender, 1 steel 

 saw, and 1 cutter and threader. A blacksmith shop is maintained in 

 connection with the machine shop and is fitted with a trip hammer, a 

 forge, an anvil, and a complete outfit of blacksmithing tools. A typi- 

 cal crew comprises 3 machinists, 1 steam fitter, 1 blacksmith, and a 

 helper. 



Two sorts of refuse burners are used. Mills located in the woods 

 usually have an open fire with a corrugated iron or masonry shield. 

 Those situated in towns or near extensive lumber yards have steel 

 refuse burners with brick foundations and linings. Such a burner for 

 a double-band mill is about 70 feet high arid 20 feet in diameter, and 

 is said to cost from $6,000 to $9,000 in place. 



The average output of a double-band miUis usually about 120,000 

 or 125,000 in a 10-hour shift for the entire sawing season. A similar 

 average output for two shifts is 240,000 daily. During the middle of 

 the season when everything is running nicely these average outputs 

 will be exceeded by from 10,000 to 30,000 per day. One firm even 



