OFFICE OF PUBLIC ROADS. 731 



all but 1,000 feet was surfaced 14 feet wide witli a sand-clay mixture. Grading 

 amounting to 3,352 cubic yards was done with a road grader, 9 wheel scrapers, 

 and 8 slips. The grade was reduced from 8 per cent to 5 per cent. The average 

 excav.-ition haul was 200 feet, and the cost was 8.8 cents per cubic yard. Five 

 concrete culverts and 1 concrete bridge were constructed. The contract price 

 for the bridge, which was 12 feet by 16 feet, was $474. Additional unit costs on 

 this work were: Shaping the subgrade, 0.27 cent per square yard; concrete for 

 the culverts, $682.82 ; loading 3,156 cubic yards of surfacing material at 3.4 

 cents per cubic j^ard, $112.40; hauling, at 22.1 cents per cubic yard, $69.S; spread- 

 ing, at 3.22 cents per yard. $104.80; roiling, $38.25; ditches, $4.40: miscellaneous 

 items, $135.55 ; superintendence. $273 ; and repairs and incidentals, $23.80, making 

 an actual total cost of $2,407.27, except for the transportation of the contractor's 

 outfit. The contractor was paid $2,786.61. The 8,800 square yards of surfaced 

 road cost 20.34 cents per square yard, which includes the 1,000 feet graded, but 

 not surfaced. This is at the rate of $1,912 per mile. The labor cost $1.60 for an 

 S-hour day, and teams, $2.80 per day. 



CoRDELL, OKf.A. — This improvement was on the State Road, running west 

 toward the county line, and was 5,000 feet long, of which 4,500 feet were sur- 

 faced 16 feet wide with sand-clay construction. The work began on May 5, 1911, 

 and was completed on May 13, 1911. The road runs through level country and 

 is underlaid with black loam and sand. It was necessary to excavate 500 cubic 

 yards of material at a cost of $12.10, and shaping the road cost $0.45. A sand- 

 clay mixture was spread over an extent of 2,666 cubic yards to a depth of 6 

 inches. Excavating, hauling, and spreading the material cost $160; and 

 charges for superintendence, guards, warden, sergeant, and the camp amounted 

 to $246.36. 



The total cost of the road was $466.32. which is 5.8 cents per square yard, or 

 at the rate of $546 per mile. Eight thousand square yards of finished surface 

 were improved, together with a portion graded, but not surfaced. Prison labor 

 cost 18 cents and teams 85 cents per day of 9 hours. 



Aiken, S. C— Construction began here on October 18, 1910, and was completed 

 on November 10, 1910. The work consisted in surfacing with a sand-clay mix- 

 ture a section 5,255 feet long and 30 feet wide on the ^Montmorency Road 

 running northeast from Aiken city limits. Three hundred and fifteen cubic 

 yards of earth were excavated at a cost of 14 cents per cubic yard, and 1,0(X) 

 cubic j-ards of clay were removed from ditches at the sides of the road at a cost 

 of 11.1 cents per cubic yard. This clay material was used for surfacing and 

 cost 0.04 cent per cubic yard to spread. The clay and sand were mixed with a 

 disk harrow and the road was rolled with a 2-ton horse roller. The surface was 

 given a crown of one-half inch to the foot and was compacted to 8 inches In 

 depth. One 10-inch vitrified-pipe culvert, 30 feet long, with 5-foot ends, was 

 built at a cost of $28.86. The maximum grade was reduced from 10 per cent on 

 the old road to 1 per cent on the new road. The surrounding country is level 

 and the subsoil is mostly sand, intermixed with clay, and worked up with the 

 material from the side ditch into a good sui-face. The following machinery 

 was available for this work : One road machine, one cutaway disk harrow, one 

 spike-tooth harrow, one hardpan plow, one side-hill plow, one split-log drag, 

 and one 2-ton roller. Among the items of cost on this work were: Back-filling 

 the side ditch, $40.07; plowing, harrowing, and grading, $81.42; grading and 

 clearing, $28.92; and rolling, $15.98. The total cost to the community was 

 $391.10, based upon prison labor at 40 cents per day and double teams, with 

 driver, at $1 per day. This is at the rate of 2..33 cents per square yard, or 

 $391.10 per mile. The work comprised 16,750 square yards. 



Allendale, S. C. — The work commenced here on October 29, 1910, and was 

 completed on November 16, 1910. Three thousand and seventy feet of the 

 Matthews Bluff Road, running southwest from Allendale, were graded and sur- 

 faced with a sand-clay mixture to an average width of 22 feet. It was neces- 

 sary to excavate 350 cubic yards and this reduced the maximum grade from 4 to 

 1 per cent. The average excavation haul was 1,000 feet, and the cost per cubic 

 yard was 12 cents. The total cost of shaping the subgrade was $6.50. The 

 road runs through level country and the soil is very sandy. Below the sand is 

 found a layer of clay, which was excavated from the ditches and placed on the 

 road at a cost of $132.75. Mixing the clay with the sand cost $35.50. and back- 

 filling the ditches with surface sand cost $19. The depth of the surfacing was 

 10 inches, but it was compacted by traffic to S inches. The road was given a 

 crown of one-half inch to the foot. The machinery used on this job was 1 



