386 EXPERIMENT STATION BECOED. [Vol.35 



"(1) The Ochoco project, which will provide irrigation for 15,500 acres in 

 the vicinity of Prineville, by storage of 40,000 acre-feet in a proposed reservoir 

 on Ochoco Creek, 6 miles above Prineville, the spillway for which will be 

 113 feet above low water. The estimated cost of this project is $51.30 per 

 acre. 



"(2) The irrigation of part of the north unit lands of the Deschutes project 

 by storage on Crooked River at the Post Reservoir site. Several alternative 

 plans are considered, comprising a low-line developniriit to irrignte 4G,(>0f) acres 

 near Haystack Butte, and 9,000 across near Prineville, with 50 miles of main 

 canal, and water by storage through the construction of a 131-ft. dam above 

 Post at a cost of $78 per acre ; a high-line development for Haystack Butte 

 lands, and all of Ochoco project lands at a cost of $83 per acre. 



"(3) A study of the availability of Crooked River storage for increasing 

 the minimum flow of lower Deschutes River for various hydro-electric power 

 developments proposed in U. S. Geological Survey Water-Supply Paper 344 (B. 

 S. R., 32, p. 279). A fall of 200 to 300 ft. in lower Deschutes River must be 

 developed before Crooked River storage at its estimated cost becomes feasible 

 for this purpose. . . . 



" A duty for water of 1.85 acre-feet per acre of irrigable land is considered 

 reasonable for the Ochoco project on the assumption that at least one-third 

 of the project will be in grains. ... It is estimated that the mean run-off 

 from Ochoco Creek is about 48,000 acre-feet, with an extreme maximum and 

 minimum of approximately 84,000 and 22,000 acre-feet during the past 12 

 years. . . . Soil and agricultural surveys of irrigable lands show the soils 

 to be from 2 to 4 ft. or more in depth, with the physical character for irriga- 

 tion and cultivation good. The plant food content of the bench lands is fair 

 and for the bottom lands excellent. ... It is estimated that during the period 

 1907 to 1915, inclusive, the mean annual run-off of Crooked River at Post was 

 approximately 216,000 acre-feet, with a maximum of nearly 350,000 acre-feet 

 and a minimum of 125,000 acre-feet." 



Irrigation pumping by electric power, G. D. Longmutr (Jour. Electricity, 

 36 (1916), No. 14, pp. 259-261). — This is a record of electric irrigation pump- 

 ing in the CoUimbia River Valley giving comparative costs from representative 

 plants picked at random from 110 plants with a concentrated load of over 700 

 horsepower. It is shown " that the plants operating as one unit secured a 

 total of 33 in. of water for 70 acres at a total cost of $7.35 per acre against the 

 individual operations of 35 in. per acre at a total combined cost of $11.30." 



Electric irrigation pumping in Idaho, W. T. Wallace (Jour. Electricity, 

 86 (1916), Nos. 12, pp. 227-230; 13, pp. 241-243) .—After tracing the recent 

 increase in irrigation pumping, the author reviews the results of recent surveys 

 conducted by power companies, wherein it was found that plant efliiciency rather 

 than power rates was the most important factor in power costs. 



Test made of model weir, B. D. Moses (Engin. Rec, 73 (1916), No. 15, p. 

 487, figs. 4)- — Laboratory investigations made at the University of California on 

 a model reduced 7 : 1 of the so-called Dolgeville model weir calibrated at 

 Cornell University and described in Water Supply Paper 200 of the U. S. Geo- 

 logical Survey (E. S. R., 19, p. 385) are reported. 



It was found that above heads of 1.4 ft. on the Cornell model (0.2 ft. on the 

 California model) the curves for the coefl!icient c were of the same general type, 

 and that the coefficient for the smaller weir was greater than that for the 

 larger. The results of this and further comparisons are thought to furnish 

 encouragement as to the reliability of deductions from small-sized weirs. 



Durability of concrete draintile, O. B. Winter and H. H. Musselman 

 (Michigan Hta. Spec. Bui. 75 (1915), pp. 3-13, figs. 4).— Field and laboratory 

 tests of concrete tile are reported. 



