. Official proceedings . military purposes. The Alaskan Road Commission has adopted the followingclassification for road work: * ■- AAagon roads are any roadscleared, grubbed, ditched, and graded and drained sufficiently Transportation Conditions in Alaska, by Capt. J- O. American Review of Reviews, 1914. 311 to accommodate wa2,on traffic ; sled roads are cleared and gradedbut not grubbed. Fairl)anks is connected witb Fort Gibbon and Circle bysled roads, while Fort Gil)bon, Koyukuk, St. Michaels, Nomeand Kfjtzebue v^oimd may be reache(l b^• trail. A trail alsoextends from Xome to Se
. Official proceedings . military purposes. The Alaskan Road Commission has adopted the followingclassification for road work: * ■- AAagon roads are any roadscleared, grubbed, ditched, and graded and drained sufficiently Transportation Conditions in Alaska, by Capt. J- O. American Review of Reviews, 1914. 311 to accommodate wa2,on traffic ; sled roads are cleared and gradedbut not grubbed. Fairl)anks is connected witb Fort Gibbon and Circle bysled roads, while Fort Gil)bon, Koyukuk, St. Michaels, Nomeand Kfjtzebue v^oimd may be reache(l b^• trail. A trail alsoextends from Xome to Seward by way of the Kuskokwim andSusitna valleys, also from Tliamna Hay through the ^lulchatnaand Kuskokwim valleys. In the location of roads the first consideration is goodbottom, the next grade, and the last shnrtness of line. In somesections practically every condition adverse to road building isencountered, when all considerations must be sacrificed in orderto make a passable tliDroughfarc. Frozen ground protected. Corduroy Road Along theMatanuska Trail. 312 bv nmss niav rccjuiro sovcra! seasons to he put i:i shape, theusual method of procedure heiui;- t(^ clear the rcxidway duringthe first season and i^rade to frost line; the second season usuallypermits of completing^ the gradiuij as the ground has thawedout. If the character of the ground underlxing the moss issuited to form into a road surface, the moss is removed fromthe line of the drainage ditches only, the surface of the roadbeing formed In up<ni which is thrown material takenfrom the ditches. Sled roads are of course intended for winter use an occasional drag road is made for haiding oredown a mountain during the summer. ^luch care nuist be takento avoid drifts and places where ice tends to collect. The dif-ficulty of crossing streams and lakes is eliminated as they arefrozen ever. The grade is the first and only consideration inthe construction of sled roads, and long detours are o
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