APPENDIX. 
The following pages are devoted to abstracts of descriptions of canals on which tests 
have been made in recent years by other agencies than irrigation investigations of 
the Office of Experiment Stations. The first number refers to the corresponding num- 
ber in Table I, page 19. Next follows the symbol referring to the experimenter, as 
listed on page 16. Tests marked * are described in detail in Engin. News, 57 (1907), 
No. 23; those marked ** are described in United States Geological Survey Water- 
Supply and Irrigation Paper 43 (1901); those marked *** are described in United 
States Reclamation Service Reclamation Record, 4 (1913), No. 7; those marked 4- 
are described in Colorado Station Bulletin 194 (1914); those marked 4-4- are de- 
scribed in University of Colorado Studies, 7 (1910), No. 4. 
CONCRETE LININGS. 
No. 2, R. S., 14***, main canal, Boise project, United States Reclamation Service. 
Rather rough, in places disintegrated by frost. Fairly clean but still some rock in bot- 
tom. Other tests in same section gives values of n from 0.0129 to 0.0148. Coefficient 
n=0.0130. 
No. 3, R. S., 8***, main canal, Boise project, United States Reclamation Service. 
Rough troweled. Small deposit rocks and gravel in bottom. Coefficient n=0.0154. 
No. 4, R. S., 36***, Sulphur Creek wasteway, Sunnyside unit, United States Rec- 
lamation Service. This covers one of four tests in same section, with discharges 
from 45 to 247 second-feet. Corresponding values of n are the same, within 0.0002 
for all discharges. Wood forms used; no retouching of surface. Circular section, 
radius 4 feet. Coefficient n=0.0108. 
No. 5, R. S., 33***, Sulphur Creek wasteway. Similar to No. 4 above, but on 2° 
curve. One of three tests with discharges from 52.5 to 247 second-feet. Correspond- 
ing values of n same within 0.0004. Coefficient n=0.0140. 
No. 6, JBL-6*, main supply conduit for Los Angeles, Cal. Covered conduit. In 
use four years, one curve in section tested. WTiere wetted, section was very smooth. 
Apparently of 1 to 3 cement-mortar plaster on concrete. No deposit or growth. Co- 
efficient n=0.0108. 
No. 7, JBL-5*. Description and reach tested same as No. 6 above. Coefficient 
71=0.0111. 
No. 8, JBL-2*, tunnel 23, San Gabriel plant of Pacific Light & Power Co., Cali- 
fornia. Covered conduit. In use eight years. No growth. Deposit conditions 
indeterminate. Slight curves near each portal. Slope determined by correcting 
office notes of floor grade by depths of water. Coefficient 71=0.0113. 
No. 9, VMC4-, Dry Creek flume, Handy Canal, Loveland, Colo. In good condi- 
tion. Lined in 1906 with cement mortar, trowel finish. Coefficient n=0.0115. 
No. 10, JBL-1*, tunnel 15, San Gabriel plant, Pacific Light & Power Co., Cali- 
ornia. A tunnel similar to No. 8 above. Slight curve at upper portal. Sharp 
angle 20 feet below lower portal. Deposit conditions indeterminate. Coefficient 
71=0.0128. 
No. 15, R. S., 20***, Ridenbaugh Canal, Idaho. Description similar to Nos. 12-13 
in text. One of three tests with discharges 50, 103, and 230 second -feet. Correspond- 
ing values of n are 0.0132, 0.0130, and 0.0122. 
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