. Ontario Sessional Papers, 1914, n to conform to thesection of the original roadway. This method has been particularly successful onthe main drive which has perhaps the largest and heaviest traffic of any roadon the Park System. With the asphaltic oil applied hot to this surface the roadwas satisfactory for traflBc all during the season. In the fall of 1911 an experiment was tried with very heavy asphalt runningto 90 per cent., remaining as a residuum after the distillation of the lighter oilsfrom natural asphaltic products. The manner of this construction was to lay twoinch stone upo
. Ontario Sessional Papers, 1914, n to conform to thesection of the original roadway. This method has been particularly successful onthe main drive which has perhaps the largest and heaviest traffic of any roadon the Park System. With the asphaltic oil applied hot to this surface the roadwas satisfactory for traflBc all during the season. In the fall of 1911 an experiment was tried with very heavy asphalt runningto 90 per cent., remaining as a residuum after the distillation of the lighter oilsfrom natural asphaltic products. The manner of this construction was to lay twoinch stone upon a consolidated subgrade and pour in the asphalt heated to abouttwo hundred degrees, and then to roll the metal thoroughly after blinding inwith fine limestone. This plan proved successful in consolidating the road metal,and but for a small area that was constructed in cold wet weather where a properbond could not be obtained, the roadway was very satisfactory for traffic, andentirely shed water without allowing it to penetrate 1914 PARK COMMISSION. 21 Another improvement completed during the year was the removal of one ofthe spans of the large iron through bridge used for the tracks of the InternationalEailway Company at the outlet of the Dufferin Islands elbow. In early daysthis channel was wide enough to require two full bridge spans, but with powercompany constructions and alterations incident thereto one span has remainedfor several years upon rock fill while the other spanned the contracted clearing away of this structure opened up the way for an improved entranceto the Dufferin Islands driveway which skirts the water of the elbow around thebend in the escarpment to the Burning Springs hill. This entrance has beenremoved southerly to cross the tracks of the International Railway Company atright angles, and provides a wide entrance for carriage traffic. QuEExsTON Heights Park. Although it was impossible to undertake the work of macadamizing the maind
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