. Bulletin of the Department of Agriculture. Agriculture; Agriculture. GATE STRUCTURES FOR IRRIGATION CANALS. 17 it was necessary to build high curtain walls above the openings in order to bulkhead out the surplus waters. The canal below the struc- ture is 20 feet wide on the bottom, carries water 6 feet deep, and has side slopes 1 to 1. The structure as shown contains 197 cubic yards of concrete, hand-mixed in a ratio of one part cement to seven parts river gravel taken bank run. The unit cost of the concrete was about $ per cubic yard. The cement cost $ per barrel f. o. b. Puebl
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. GATE STRUCTURES FOR IRRIGATION CANALS. 17 it was necessary to build high curtain walls above the openings in order to bulkhead out the surplus waters. The canal below the struc- ture is 20 feet wide on the bottom, carries water 6 feet deep, and has side slopes 1 to 1. The structure as shown contains 197 cubic yards of concrete, hand-mixed in a ratio of one part cement to seven parts river gravel taken bank run. The unit cost of the concrete was about $ per cubic yard. The cement cost $ per barrel f. o. b. Pueblo, while the cost of the gravel was practically nothing but the digging and the hauling. Earth and shale excavation cost 40 cents per cubic yard for 110 Scale in feet Orsrted by Frpd C 5ccbey •Rods-3C-C Fig. 1.—Headgate, Doyle Arroyo feeder, Napesta Ditch & Reservoir Co., Colorado. The total cost of the structure, including the steel gates, which were made in Pueblo, was about $2,500. The lifting device is the double stem, bolted together with spool spreaders, a type which is much used in southeastern Colorado. HEADWORKS, NORTH LARAMIE LAND CO. CANAL, WYOMING. A good example of modern construction for a headgate serving a small canal is that of the North Laramie Land Co. (PL V, fig. 1.) A simple and efficient form of temporary diversion dam raises the water sufficiently to secure the desired discharge into the canal. This canal is 14 feet wide at the water line, 8 feet wide on the bottom, and 45613°—Bull. 115—14 3. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
Size: 1767px × 1414px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
