OBJECT-LESSOX AND EXPERIMENTAL ROADS, 1912-13. 25 
The outfit consisted of 4 drag scrapers, 2 Fresno scrapers. 1 wheel scraper, 
one 8-horse road machine, 1 steel road drag. 1 plow, 1 disk harrow, 1 spike 
harrow, and hand tools. Labor cost $2 and teams $4 per 10-hour day. 
The total cost of the road to the community was $1,663.15, which is at the 
rate of $0,311 per square yard. The principal items of cost were as follows: 
Excavation, at $0.15S per cubic yard, $120 : shaping the subgrade. at $0,005 per 
square yard, $2S.20 ; loading gumbo, at $0,155 per cubic yard, $1S0.40 ; hauling 
gumbo, at $0.60 per cubic yard, $69S.S0 ; spreading gumbo, at $0,029 per cubic 
yard, $34; loading sand, at $0,105 per cubic yard, $93.60; hauling sand, at $0,336 
per cubic yard, $299; spreading sand, at $0,012 per cubic yard, $10.60; mixing, 
at $0,007 per square yard, $37.20; rolling, at $0.0025 per square yard, $13.60; 
shaping, at $0,001 per square yard, $4; shoulders and ditches, $46.40; purchase 
of gumbo pit, at $125 per acre, $41.35; miscellaneous, $14; and superintend- 
ence, $42. 
SHELL ROADS. 
Foet Myees. Fla. — A shell road leading from Fort Myers toward Funta 
Rassa, known as the McGregor Boulevard, was begun on May 15, 1912. and 
completed on December 11, 1912. This road was constructed in two sections — 
one section lying within the corporate limits of Fort Myers and paid for by 
the municipality, and the other outside of the corporate limits and paid for by 
the county. The land adjacent to the road is approximately level and the soil 
is sandy throughout. 
The town section (icaterbound) . — The town section was 7,200 feet long, and 
was graded to a width of 28 feet outside to outside of shoulders or 36 feet between 
curbs. The shell surface replaced an old surface of the same kind which had 
become badly worn, and extended the entire length of the section. It was 16 feet 
wide and the surfaced area was 12.S00 square yards. The shell was spread 12 
inches deep and compacted to 6 inches. The total amount of shell used was 
3,S3S cubic yards, all of which was purchased at a cost of $1.0203 per cubic 
yard. Two hundred and five feet of vitrified clay culvert pipe, ranging in 
diameter from 15 inches to 24 inches, was used. A reinforced concrete girder 
bridge, having a span of 24 feet, a width of roadway of 24 feet, and a 6-foot 
height of opening, was constructed at station 59. This bridge was constructed 
by contract and cost $1,540. 
The total cost of the road, exclusive of the concrete bridge, was $6,539.36, 
making a rate of $0,511 per square yard. The cost of labor was $1.50 per 10- 
hour day and of teams $5 per day. The principal items of cost were: Clear- 
ing, fine grading, and trenching, $579.60 ; scarifying the old road, $115.50 ; cul- 
vert pipe delivered, $1S3.70 ; labor for pipe culverts, $70 ; surfacing material at 
dock, $3,915.96; hauling the surfacing material from the dock to the road. 
I1.1S6.35 ; spreading the surfacing material. $334.25 ; and rolling, $154. Wood for 
fuel for the roller was cut by county convict force and the cost is not included. 
The equipment consisted of a 10-ton road roller, slat-bottom wagons, and 
hand tools. The average haul for shell was 1 mile and for water for the roller 
£ mile. 
The county section (bituminous). — The county section was 9,100 feet long and 
had been partially graded before the object-lesson work was begun. The avail- 
able cost data concerning grading were, therefore, not complete. The width 
graded was 24 feet and the width surfaced 16 feet, making a total area of 24.267 
square yards graded and 16,178 square yards surfaced. The shell was spread 
to a depth of 14 inches in the center and 10 inches on the sides, and compacted 
to 7 inches in the center and 5 inches on the sides. The shell was old and rotten 
and ranged in size from whole oyster shells to small fragments. 
