24 BULLETIN 284, U. S. DEPARTMENT OF AGEICULTTTEE. 



the contracts let amounts to $597,458.79. Highways Nos. 5, 6, 7, 8, 14, and 16, 

 totaling 62 miles, still remain to be contracted for under the $900,000 bond 

 issue. The work done has proved so successful that steps have been taken to 

 raise $300,000 additional for the construction of a bridge over the Calcasieu 

 River, and to extend the highway system now being constructed. 



Considerable work was done by convicts in the manufacture of concrete pipe 

 and concrete piles. The following were the unit costs for this work : 



12-inch concrete pipe at 12 cents per foot ; 



18-inch concrete pipe at IS cents per foot ; 



15-foot concrete piles at $11.60 each; 



25-foot concrete piles at $14.S0 each. 

 A list and description of the roads on which contracts have been awarded to 

 date follows : 



Highway No. 1 consists of 9 miles of 15-foot gravel road, 6 inches thick, with 

 earth shoulders ; and 5J miles of 9-foot brick road on a 5-inch gravel base, part 

 with earth shoulders and part with 6-inch gravel shoulders. The shoulders are 

 3 feet wide. All bridges and culverts are of reinforced concrete, and the pipe 

 culverts are provided with concrete head walls. The following unit prices 

 obtained : 



Clearing and grubbing, complete $300. 00 



Excavation, per cubic yard .195 



Embankment, per cubic yard . 22 



Vitrified pipe, 12-inch, per foot, complete . 70 



Vitrified pipe, 18-inch, per foot, complete 1. 00 



Concrete pipe, 12-inch, per foot, hauling and placing only .40 



Concrete pipe, 18-inch, per foot, hauling and placing only . 50 



Gravel road, per square yard .30 



Vertical fiber brick on gravel base, per square yard 1. S5 



Concrete piles, hauling and driving, per linear foot 1.00 



Concrete, 1:2:4, per cubic yard 9. (X) 



Concrete, 1:3:6, per cubic yard- . 7.50 



Reinforcing steel, per pound .03 



Highway No. 2 consists of 12 miles of brick road feet wide, on a 5-inch 

 gravel base; 9 miles of 15-foot gravel road, 6 inches thick; and considerable 

 bridge work. This work was let in three contracts. 



Contract No. 1, for sections 1 and 3, was let at the following unit prices: 



Clearing and grubbing, complete $225.00 



Excavation, per cubic yard .24 



Embankment, per cubic yard .24 



Vitrifiod pipe, 12-inch, per foot, complete .60 



Vitrified pipe, 18-inch, per foot, complete .95 



Concrete pipe, 12-inch, per foot, hauling and placing only .40 



Concrete pipe, 18-inch, per foot, hauling and placing only .50 



Gravel road, per square yard .25 



Vertical fiber brick on gravel base, per square yard LOT 



Contract No. 2. for bridges and culverts on sections 1 and •'. w n s lei :it the 

 following unit prices: 



Concrete, 1:2:4. per cubic yard $8.10 



Concrete, 1:3:6, per cubic yard 7.10 



Reinforcing steel, per pound .0575 



