Frictional Resistance in Artificial Waterways 29 
Section (b), Fig. 14, 1,350 feet in length and located one- 
half mile east of Rocky Ford, has a straight alignment. The bed 
is of fine sand, with sides of clay. Some grass overhangs into the 
water. The pulsation of the water surface was .01 feet. 
The friction coefficients of these two sections are almost 
identical. 
FORT LYONS CANAL, LA JUNTA. This canal, Fig. 
15, one of the largest in Colorado, was built to carry 2,000 second 
feet of water, and is over 113 miles in length. The experiment 
was made in August, at a season when the canal was carrying little 
Fig - . 15. Fort Lyons Canal, La Junta. 
more than its first priority. The 137.26 second feet conveyed com¬ 
pletely covered the bed of the canal for a width of from 65 to 70 
feet, and from a depth of from 1 to 1.5 feet, making the conditions 
for such a test very favorable. The 2,600-feet section investigated, 
is located about five miles east of La Junta. It is constructed on 
a tangent, except for possibly 100 feet at the ends which are 
slightly curved. The canal bottom is composed of very fine silt 
merging into fine sand, and this in places is quite boggy. It is 
exceptionally smooth and regular and free from any impediments 
to check the flow of the water. This accounts for a lower co¬ 
efficient than ordinarily assigned to earth channels. The pulsa¬ 
tion of the water surface was inappreciable. 
JARBEAU POWER CANAL, RIFLE. An experiment was 
made upon this waterway just a few days after it had been put in 
operation for the first time and before much change in the cross- 
Fig. 16. Jarbeau Power Canal, Rifle. 
