. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 74 BULLETIN 126, U. S. DEPARTMENT OE AGRICULTURE. CENTRAL OREGON IRRIGATION CO., DESCHUTES, OREG. The north canal of this company is concrete lined and diverts water from the Deschutes River a short distance below Bend, Oreg. A 1:4:5 mixture of Portland cement, sand, and crushed rock was used on this work, the extra amount of sand being required to replace a considerable portion of the grout lost in the dry wall back of the lining. In preparation for lining the earth slopes, made 1^ to 1 to avoid the necessity for form
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 74 BULLETIN 126, U. S. DEPARTMENT OE AGRICULTURE. CENTRAL OREGON IRRIGATION CO., DESCHUTES, OREG. The north canal of this company is concrete lined and diverts water from the Deschutes River a short distance below Bend, Oreg. A 1:4:5 mixture of Portland cement, sand, and crushed rock was used on this work, the extra amount of sand being required to replace a considerable portion of the grout lost in the dry wall back of the lining. In preparation for lining the earth slopes, made 1^ to 1 to avoid the necessity for forms, were finished to within 4 inches of the inner surface of the completed work. The rock slopes, however, were so badly broken that it was necessary to fill cavities with hand-laid drv walls (fig. 8). Sectional forms made of shiplap were used repeatedly on the 6,300 lineal feet of canal through rock, but no forms were used on the 1,000 lineal feet of canal in earth. Expansion joints spaced at 12-foot intervals along the sides and bottom were made of \ by 4 inch wooden strips left in the finished Fig. 8. -Section of concrete-lined canal in rock, Central Oregon Irri- gation Co., Deschutes, Oreg. DAVIS & WEBER COUNTDZS CANAL CO., OGDEN, UTAH. During the years 1909 and 1910 this company enlarged and con- crete lined 9^ miles of its main canal. When the canal was built in the eighties it carried less than 100 second-feet, but its capacity has been increased from time to time until in 1909 it reached 200 second- feet. It has been difficult and expensive to maintain this canal owing to its location near the top of a steep hillside flanking the Weber River on the south. In July, 1893, the writer made a series of current meter measurements to determine the seepage losses throughout its length. The results showed a discharge at the headgate in Weber Canyon of second-feet which in 9^ miles seepage had reduced to 78-J- second-feet, representing a loss of 26 per cent of
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