CONCRETE LINING FOR IRRIGATION CANALS. 
measurements — Continued. 
15 
Loss per mile. 
Maxi- 
mum. 
Mini- 
mum 
Mean. 
Loss per 
square 
foot of 
wetted 
area in 
24 hours. 
Character of material 
in the channel. 
Source of informa- 
tion. 
Remarks. 
Per 
cent. 
Per 
cent. 
Per 
cent. 
1.220 
1.470 
1.540 
1.24 
Cu.feet. 
0.93 
1.05 
1 .75 
48.00 
17.80 
17.40 
.53 
1.65 
1.41 
1.79 
.56 
1.15 
Some gravel and 
some white lime. 
See reference. 
Report Elias Nelson, 
Idaho Expt. Sta. 
Bui. 58, May, 1907. 
....do 
.do. 
Compact gravel for § 
mile on either side 
of McMullin Creek; 
compact clay loam 
in other places. 
Compact gravel 
mixed with dense 
clay loam not so 
gravelly as preced- 
ing section. 
Compact gravel and 
clay loam, mixed 
with gravel. 
Deep uniform clay 
loam. 
.do. 
Report D. H. Bark, 
9th Biennial Re- 
port State Eng. 
Idaho, 1911-12. 
.do. 
....do. 
.do. 
.do. 
Medium clay loam, 
some surface rock 
on top of ground. 
Deep medium clay 
loam. 
Medium clay loam, 
hardpan near sur- 
face. 
Deep medium clay 
loam. 
.do. 
.do. 
.do. 
.do. 
Measured July 2, 1907, from 
end of main canal to Cot- 
tonwood Creek. 
Measured July 3, 1907, Cot- 
wood Creek to Cedar draw. 
First season. 
Measured July 6, 1907. Cedar 
draw to near end of canal. 
First season. 
Measured July 26, 1912, from 
1 mile above McMullin 
Creek to Cottonwood 
flume. Banks solid; uni- 
form grade and cross sec- 
tion; porous irrigated land 
above; used 7 years. 
Measured July 26, 1912, from 
1| miles below Rock Creek 
to 1 mile above McMullin 
Creek. Banks solid and 
well above water line; uni- 
form grade and cross sec- 
tion; used 7 years. 
Measured July 26, 1912, from 
| mile above to 1 J miles be- 
low Rock Creek crossing. 
Banks very solid and well 
made-, uniform grade and 
cross section; porous irri- 
gated land above; used 7 
vears. 
Measured July 25, 1912, from 
station 180+30 to within 
\ mile of Rock Creek cross- 
ing. Banks well above 
water line; uniform grade 
and clean uniform cross 
section; used 7 vears. 
Measured July 26, 1912, from 
i mile below Low Line 
Canal to station 180+30. 
Banks well above water 
line; uniform grade and 
clean uniform cross section; 
used 7 years. 
Measured Sept. 10, 1912, 1 
mile south of Twin Falls. 
Banks irregular; some grass 
and weeds; used 5 years. 
Measured Sept. 14, 1912, 4 
miles northwest of Twin 
Falls. Irregular cross sec- 
tion; badly eroded; some 
grass and weeds; used 4 
years. 
Measured Sept. 11, 1912, 7 
miles southwest of Twin 
Falls. Irregular cross sec- 
tion; banks eroded; sweet 
clover in lower half of 
ditch section. 
Measured Sept. 13, 1912, 2 
miles northeast of Filer. 
Sodded banks; moss in 
water; uniform cross sec- 
tion; water in ditch above 
normal surface of ground; 
used 4 years. 
