LOGGING IN THE DOUGLAS FIR REGION. 
107 
imd downhill. No rock was encountered. The logs, averaging 1,800 
feet in volume, were yarded an average maximum distance of 900 
feet. About one-third of the timber was double hauled. The av- 
erage scale per engine per yarding day was 70,000 feet. The cost 
for 1911 included all the wire rope used in camp. It is not possible 
to state the average maximum distance from the stump to the land- 
ings. Most of the timber was moved 2,000 feet by logging engines, 
a considerable amount 4,000 feet and a small amount 7,500 feet. The 
cost for 1910 includes the same items as the cost for 1911. 
In estimating the cost of wire rope in connection with timber- 
appraisal work, two methods may be used. The first is to use the 
actual cost per thousand feet in a camp where conditions are approxi- 
mately the same as the case being dealt with. The second is to 
develop the average cost in a more or less hypothetical way. A third 
method would be to check the results given by the second against the 
first. The following tables illustrate the second method in connec- 
tion with single hauling. 
Table 19. — Estimated cost by second method. 
case i. 
Kind of line. 
Size. 
Length. 
Cost per 
foot. 
Cost per 
line. 
Freight. 
Total 
cost. 
Output. 
Cost per 
1,000 
feet. 
Inches. 
Feet. 
1,200 
2,500 
2,500 
Cents. 
32.50 
8.00 
6.25 
Dollars. 
390. 00 
170. 00 
156. 25 
Dollars. 
7.35 
3.00 
3.00 
Dollars. 
397.35 
173.00 
159. 25 
Feet. 
4,000,000 
8,000,000 
25,000,000 
Dollars. 
0.093 
Trip 
0. 0216 
Straw 
1 
0.006 
Total 
716. 25 
13.35 
729.60 
0. 1206 
CASE 2. 
Main yarding 
i 
1,200 
2,500 
2,500 
40.00 
10.00 
6.25 
480. 00 
250. 00 
156. 25 
9.00 
3.88 
3.00 
489. 00 
253. 88 
159. 25 
4,000,000 
8,000,000 
25,000,000 
0. 1220 
Trip 
0. 0317 
Straw 
0. 006 
Total 
886. 25 
15.88 
902. 13 
0. 1597 
Rigging. — While it is the practice of most operators to include in 
the wire-rope account all the wire rope used, a few operators keep 
a rigging account, in which they may include crotch lines used in 
loading, yarding (not main yarding), and tag lines used in yard- 
ing, chokers, and straps. 
It is not possible to discuss the cost of rigging per thousand feet 
except in a general way. largely because operators as a class have 
paid little attention to keeping records of this expense. 
The maintenance or replacement of chokers is the largest item of 
expense in a rigging account and varies with conditions the same 
as the cost of main yarding lines, and for the same reasons. The 
