. American forestry. Forests and forestry. FORKST ROADS AXI) TRAILS 507. I'lXliS SLOWLY IXVADIXC. TIllC CRASS FORMATION AT THE HEAD OF CANYONS. THE LIGHT AREAS ARE ROCK OUTCROPS. sible a great deal of rock work can be done. The two materials used for blasting are dynamite, which costs from 10 to 15 cents per pound, and black powder, which is about the same price. Dynamite when exploded works in- stantaneously with a sharp shock, while black powder works slower and exerts more of a shoving force. The cost of rock work varies from $ .50 to $ per cubic yard. In general in building trails the
. American forestry. Forests and forestry. FORKST ROADS AXI) TRAILS 507. I'lXliS SLOWLY IXVADIXC. TIllC CRASS FORMATION AT THE HEAD OF CANYONS. THE LIGHT AREAS ARE ROCK OUTCROPS. sible a great deal of rock work can be done. The two materials used for blasting are dynamite, which costs from 10 to 15 cents per pound, and black powder, which is about the same price. Dynamite when exploded works in- stantaneously with a sharp shock, while black powder works slower and exerts more of a shoving force. The cost of rock work varies from $ .50 to $ per cubic yard. In general in building trails the coun- try should first be reconnoitered and the route fully decided upon. The trail should then be located by stakes or blazes and the route cleared and brushed out to the specified width. The grading work should then be done and the tread made the specified width. Signs show- ing the distance from important points and from water should be put in every mile if possible and never less than every -1 or 5 miles. ROAD CONSTRUCTION. The use of a road largely determines the amount of work which should be done upon it. Freight roads and stage roads as a rule should be well worked and kept in good condition and if there is a great amount of traffic they should be double tracked or turn-outs made along the way, while for logging pur- poses it is not so necessary to have a well worked road, as it is onlv used '^^H \^ ?. ???\ , ; ,, , .H"5 ^ -:^- ' -f,'.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Forestry Association. Washington, D. C. : American Forestry Association
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
