50 BULLETIN 284, U. S. DEPARTMENT OF AGRICULTURE. 



West Rutland, Vt. — Work was begun September 20, 1913, on a gravel road 

 starting 3$ miles west of West Rutland and extending toward Castleton. It 

 was completed October 8, 1913, witb a loss of two days on account of rain. 

 Tbe adjacent land is billy and tbe natural soil is sandy loam. 



Tbe road was graded 26 feet wide in botb cuts and fills for a distance of 528 

 feet. Tbe maximum cut was 2 feet, tbe maximum fill 1.8 feet, and tbe maxi- 

 mum grade of 4 per cent on tbe old road was reduced to 3 per cent on tbe 

 new road. A surface of bank gravel 21 feet wide was laid, making a sur- 

 faced area of 1,232 square yards. 



One 3 by 3 foot masonry culvert was lengthened. 



Tbe total cost of the work, including culvert, was $265.S3, or $0,215 per 

 square yard. 



EXPERIMENTAL ROAD WORK. 



A portion of the special appropriation for experimental road im- 

 provement was used to resurface with limestone macadam the road 

 known as the Eockville Pike, in Montgomery County, Md., and to 

 then treat the surface with various bituminous materials in con- 

 junction with gravel, trap-rock screenings, and limestone screenings. 

 The resurfacing was begun March 15, 1913, and the surface treat- 

 ment started on September 5, 1913. The work was completed and 

 the road opened to the public on December 17, 1913. In addition to 

 the Rockville Pike, a 1,500-foot section on Bradley Lane, east from 

 the pike, was resurfaced with limestone. The land adjacent to the 

 road is rolling and the natural soil is for the most part a mica clay. 



The reports following describe the resurfacing as done under the 

 four contracts into which the work was divided. For a detailed 

 description of the bituminous surface treatments, which were car- 

 ried out in seven distinct sections, see Department Bulletin No. 105, 

 " Progress Report of Experiments in Dust Prevention and Road 

 Preservation, 1913." 



Limestone Macadam Resurfacing. 



Contract No. 1, Rockville Pike, Md. — Work was begun March 15, 1913, on 

 the road from station 61+20 to station 210 and was completed August 8, 1913, 

 with a loss of eight days on account of bad weather. The old roadbed was 

 loosened by spikes in tbe roller wheels and a 3-ton scarifier. 



The old macadam was reshaped and a surface of macadam was laid for 

 14,460 feet, 15 feet wide, making 24,100 square yards. About 24S.22 tons of 

 No. 1 stone were used to fill depressions, after which 2-911.75 tons of No. 2 

 stone were spread 3 inches deep before compacted, and 1,164.31 tons of stone 

 screenings used for a binder course. The stone was shipped on the cars and 

 the haul from the cars to the road was 1J miles. 



Ditches were dug to the extent of 20,923 linear feet. 



The equipment consisted of three 10-ton steam rollers, one sprinkler wagon, 

 grading machine, dump wagons, gasoline pumps, tanks, small tools, etc. 



The road was built by contract for $11,63S.14, which is at the rate of $0,483 

 per square yard. Labor cost $1.70 and teams $4.50 per day of eight hours. 



