ROADBUILDING COSTS 



Feet/ 3Cre defines the road length in feet to be built for each acre to be skidded as a 

 function of the average skidding distance. It is derived similarly to setup time/acre and 

 introduced into the program as "RDLG. " In figure 5 below, 



l(unit distance) X 43,560 (sq.ft. /acre) 

 ^ " 2y (feet) 



20,000 , . u ^ 1 X, • • 



X = (roughly, since the road length equation is 



^ the same for all skidding methods) 



where x = feet of road length/acre to be skidded 



y = average skidding distance. 



$/hour represents the roadbuilding cost per hour. Like owning and operating 



costs, it is the average of all roadbuilding tractor costs observed--$l3 ,58/hour, which is 

 shown in the program as $13.58. 



12 



Figure 5. — Typical configuration when building skidding roads. 



