22 BULLETIN 155, U. S. DEPARTMENT OF AGRICULTURE. 



maximum head of 130 feet, was built for the Denver Union Water 

 Co. The contracting firm states that this was done in 75 days, with 

 a force consisting of 150 men and 100 teams, and that this included 

 hauling 30,000 tons of material an average of 10 miles on wagons. 

 This is considered to be very rapid construction for a pipe of this 

 size laid in a trench averaging 7 feet deep. 



In building a long line of continuous stave pipe it is customary 

 to employ several crews at convenient intervals of a thousand feet 

 or more. The different sections of pipe so built are joined by cut- 

 ting staves to fit, allowing about one-eighth-inch extra length so that 

 when sprung in place the end joints come tight. 



COST OF CONTINUOUS STAVE PIPE. 



The cost of continuous stave pipe of any particular size varies so 

 much according to design, spacing of bands, location relative to trans- 

 portation lines, conditions affecting erection, etc., that it is impos- 

 sible to give general costs, but some data of a specific nature relative 

 to certain pipe lines which have been built may be of value for 

 purposes of comparison. 



Eighteen-inch. — At Astoria, Oreg., 1\ miles of 18-inch pipe built in 1895. 1 

 Staves, fir, If inches thick, milled from 2 by 6 inch lumber. Bands, seven- 

 sixteenths inch diameter upset to one-half inch at threads. Clips No. 12, 

 B. W. G., li inches wide, treated. Shoes, Allen patent, malleable iron, weight 

 10 ounces each. Contract prices of steel in bands, 4.8 cents per pound. Lum- 

 ber, gross measurement, $35.40 per 1,000 feet b. m. Average spacing of bands, 

 5iV inches. Cost of pipe to the city, 90.33 cents per linear foot, including acces- 

 sories or 76 cents excluding them. These figures are not the actual cost of 

 building the pipe, as Mr. Adams says : " It is presumable that the contract 

 prices represent a profit of from 12| to 15 per cent." The approximate cost 

 of replacing this line with one of the same size and length in 1911 was 

 $75,000, .redwood staves 1^ inches thick being used in the new pipe. The cost 

 given includes engineering expense. 



Thirty inch. — At Denver, Colo., in 1889, z a 30-inch pipe 16.4 miles long re- 

 quired 1,869,000 feet b. m. of Texas pine, which cost $51,399.28, at $27.50 per 

 M, and 271,900 half-inch bands, which cost $54,299.55; erection of pipe by 

 contract, at 5.1 cents per band, $13,866.03; total, $119,564.86, or $1,361 per 

 linear foot. Trenching cost 48 3 cents per foot in addition to foregoing. 



At Jerome, Idaho, 1912, 1,529 feet; 30 inches diameter; fir staves, If inches 

 thick ; bands, one-half inch diameter ; pressure, to 47 feet ; average haul, 10 

 miles ; built in trench and buried 2 feet deep. Cost, including everything except 

 engineering and administration,, $2,922, or $1.91 per linear foot. 



At Idaho Falls, Idaho, 1905 ; 800 feet ; 30 inches diameter ; fir, one-half inch 

 bands; maximum head, 34 feet; supported on wood cradles. Cost, $1.55 per 

 linear foot, including everything. 



At Kennewick, Wash., 1908; 9,490 feet; 30 inches diameter; head, to 180 

 feet: built by contract on prepared foundation for $1.85 per foot. Includes 

 delivery of material at railroad point, but no haul or earthwork. 



1 Trans. Amer. Soc. Civ. Engin., 36 (1896), p. 1. 

 -Trans. Amer. Soc. Civ. Engin., 31 (1894i. p. 143. 



