. Reports of the Department of the Interior for the Fiscal Year ended June 30, 1917. ilistsmay travel these roads with safety and with greater degree of ease and com-fort. Grades should be reduced wherever possible to a maximum of 6 to 8per cent. Sharp curves should be eliminated and the roadbeds widened to notless than 16 feet. In addition, and in order to decrease the heavy expense ofopening and repairing the roads in the spring, they should be thoroughlyditched and drained and sufficient culverts installed to prevent washouts. The roads on the floor of the valley between the village and Poh
. Reports of the Department of the Interior for the Fiscal Year ended June 30, 1917. ilistsmay travel these roads with safety and with greater degree of ease and com-fort. Grades should be reduced wherever possible to a maximum of 6 to 8per cent. Sharp curves should be eliminated and the roadbeds widened to notless than 16 feet. In addition, and in order to decrease the heavy expense ofopening and repairing the roads in the spring, they should be thoroughlyditched and drained and sufficient culverts installed to prevent washouts. The roads on the floor of the valley between the village and Pohono bridgehave been widened and grades reduced where necessary, and an additional 4miles have been graveled to a width of 16 feet. This brings the total amountof roads on the floor of the valley that are now in fairly good condition, sur-faced with either gravel or macadam, to about 9 miles. There still remainsome 13 miles of road to be improved. Funds have been made available forthis work and it will be completed during the coming year. REPORT DIRECTOR NATIONAL PARK SERVICE. 923. 924 REPORT DIRECTOR NATIONAL PARK SERVICE. It is also proposed during the coming autumn to experiment with oil on asmall portion of these roads. If the experiment proves satisfactory it will berecommended that this method of treatment be extended to all of the roads onthe floor of the valley, thereby eliminating the expensive and present unsatis-factory method of sprinkling with water. In September, 1916, under specific appropriation by Congress, work was be-gun on the reconstruction of the El Portal road, between Pohono bridge andthe western park line, a distance of 8 miles. The grading of approximately1 mile of this road was completed during the year. When completed the roadwill have not more than 20 feet clear driveway, surfaced with oil-bound mac-adam and will have grades not exceeding per cent. Too much importancecan not be attached to the necessity for the completion of this work, as atprese
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