420 I'oresiry Quarterly. 



The cost of driving may be summarized as follows: 



Clearing river, $4,000 . 00 



10 Americans at $3.00 per day, 80 days, .... 2,400.00 



65 Mexicans at $1.75 per day, 80 days, .... 7,700.00 



Board, 50 men at $0.50 per day, 80 days, 2,000.00 



3,000 broken ties at $0.28, 840.00 



Damages, 600.00 



Dynamite and pike poles, 100. 00 



Camp equipment, 250 . 00 



Total, $17,890.00 



This makes the average cost of driving $0.06 per tie. 

 Booming. 



The boom is about 800 feet long and is composed of 92 

 thirty-foot yellow pine logs from 18 to 30 inches in diameter, 

 with an average diameter of about 22 inches. In the case of 

 small logs they are often placed two deep. Two logs are fastened 

 side by side with pieces of cull ties. 



Often cull ties are spiked on top of the logs. The pairs of 

 logs are fastened together, end to end about 18 inches apart 

 with large chains passed through the ends of the logs. The logs 

 were hauled by wagon a distance of 10 to 15 miles at a cost of 

 $2.00 per log. The boom is taken out of the river every sum- 

 mer at the close of the loading operations. With such care the 

 boom is replaced about every six years. 



Sixteen square cribs hold the boom in place diagonally across 

 the river. Each crib is constructed of about 6 tiers of 16-foot 

 logs about 6 inches in diameter. These are filled with rocks. 

 The construction of each crib required the services of 6 men for 

 about 4 days. 



The improvements to be charged off in six years are as fol- 

 lows : 

 Boom — 



60 M. feet logs at $1.00 per M, $60.00 



Hauling at $2.00 per log, 185.00 



Boom chains, 100 at $1.50, 150.00 



Cribs 



Logs and hauling, 100 . 00 



Building 16 cribs, 6 men 4 days at $1.75 . . • 672.00 



Total, $1,167.00 



