66 BULLETIN 194, TJ. S. DEPARTMENT OF AGRICULTURE. 
ter with, some pebbles 2 inches. Slight growth of grass on one side. In opinion of 
writer value of n is lower than might be expected. Coefficient n=0.0184. 
No. 143, SF-13**, small lateral from Corinne Branch Bear River Canal,- Utah. In 
good condition. Excavated in clayey loam. Now well lined with silt. Numerous 
footprints of stock in bed. Coefficient n=0.0194. 
No. 144, SF-16**, Millville and Providence Canal. Constructed 33 jrears before 
test in compact clay dotted with small rock fragments one-half inch diameter. One 
side perfectly smooth, other side has willow roots. Few small cobbles in bed. Other- 
wise good condition. Coefficient n=0.0195. 
No. 146, SF-17**, Logan and Hyde Park Canal in Logan, Utah. Bed of clay cov- 
ered with thin layer of fine sand. About one-sixth of perimeter covered with low 
creeping water plant. (Value of n is lower than might be expected in opinion of 
writer.) Coefficient n=0.0197. 
No. 147, VMC+, Mesa lateral a, Grand Valley Canal, Colorado. Carrying nearly 
full capacity. Bed lined with fine sediment. Sides rather uneven surface of clay 
loam. Short grass on bank was submerged one-half foot. Coefficient n=0.0200. 
No. 148, SF-20**, Solveson & Co. Canal, Utah. Channel of small pebbles embedded 
in sand. Coefficient n=0. 0201. 
No. 150, SF-48**. lateral of Logan City Canal, Utah. Channel of pebbles size of a 
pea, embedded in finer material. No aquatic growth. Coefficient n=0.0204. 
No. 152, W-3++, Fvist and Goss Ditch, Colorado. Built in heavy loam. Sides and 
bottom well coated. No weeds or aquatic growth. Coefficient n=0.0204. 
No. 153, VMC+, Willcox Canal, Rifle, Colo. Bed of fine silt, sand, and pebbles, 
with thin scattering of G-inch cobbles. Discharge tested less than one-twentieth of 
rated capacity. Coefficient n=0.0205. 
No. 154, W-4+ + , Old Barnes Ditch, Colorado. In good condition. Constructed 
in firm earth. Channel well coated with sediment. No stones or pebbles, but some 
long grass overhangs banks. Coefficient n=0.0206. 
No. 156, SF-£**, Logan and Richmond Canal, Utah. Bed smooth and free from 
vegetation. Some indentations near top of channel. Coefficient ?i=0. 0211. 
No. 159, SF-4**, Logan, Hyde Park and Smithfield Canal, Utah. Channel com- 
posed of well-packed gravel, mostly of stones from 1 to 3 inches in diameter in equal 
proportion. (This value appears low to the writer.) Coefficient n=0. 0213. 
No. 163, SF-11**, Point Lookout Canal, Utah. When tested carrying about one- 
seventh of capacity. Channel smooth clayey loam lined with sediment. No vege- 
tation in the reach, but some both above and below. Coefficient n=0.0218. 
No. 165, VMO+, Bessemer Canal, Pueblo, Colo. Bed of smooth waterworn adobe. 
Coefficient n=0.0219. 
No. 166, VMC+. Same canal as No. 165 above. Channel the same except for the 
presence of cottonwood tree rootlets at the sides. Coefficient n=0.02Sl. 
No. 168, W-2-| — |-, Louden Ditch, Colorado. Bed has clean, sandy bottom without 
growth of any kind. Would be considered in fair condition. Coefficient 72=0.0220. 
No. 169, VMC+, Mesa lateral, Grand Valley Canal, Colorado. Bed smoothly lined 
with fine sediment. Sides of uneven loam. Short grass on bank submerged one-half 
foot. Coefficient n=0.0220. 
No. 170, VMC+, Rio Grande, lateral 1-c, Del Norte, Colo. Description about the 
same as for No. 171, except that the gravel is finer. Coefficient n=0.0221. 
No. 171, VMC+ , Rio Grande, lateral 1, Del Norte, Colo. Bed varies from fine 
gravel to smooth round rocks about 6 inches in diameter. Coefficient n=0.0390. 
No. 176, SF-19**, Lewiston Canal, Utah. At time of test carrying one-fourth rated 
capacity. Bed of smooth clay. About one-fifth of perimeter covered with frog moss. 
Coefficient n=0.0224. 
