CONCRETE LINING FOR IRRIGATION CANALS. 
measurem cnts — Continued . 
23 
Loss per mile. 
Maxi- 
mum. 
Mini- 
mum. 
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. 
1.25 
5.13 
3 
2.00 
2.09 
2.52 
11.61 
2.29 
11.96 
2.32 
1.82 
18.36 
112. 40 
18.50 
120.00 
1 15. 20 
12.06 
| i 7. 70 
i 5. 52 
! 43.90 
58.80 
5.10 
2.40 
3.20 
3.30 
3.90 
Cu. feet. 
0. 
2.04 
1.42 
U.31 
11.25 
.23 
.52 
.17 
1.39 
1.18 
.68 
12.52 
12.20 
11.46 
!1.84 
11.96 
i .93 
i 1.88 
11.13 
1.17 
1.97 
]Clay and silt over- 
> lain with wind- 
I blown ash. 
Gravel, silt, and clay 
overlain with wind- 
blown ash. 
....do 
Hardpan overlain 
with mud. 
....do 
Report F. W. Han- 
na, in report of 
Boise Conference 
of Operating En- 
gineers, U.S.R.S., 
Boise, Idaho, 
Nov., 1911. 
....do 
Mostly mud bottom 
underlain with 
hardpan. 
Hardpan overlain 
with mud. 
....do 
....do 
do 
Clay, silt, muck, and 
sand. 
....do 
....do 
.do. 
35 
1.28 
Granite, sand wash, 
and silt. 
Sand, granite wash, 
gravel, and silt. 
Clay loam mixed 
with gravel. 
Deep and porous me- 
dium clay loam. 
Impervious clay 
loam. 
Deep, uniform, and 
finely divided clay 
loam. 
.do. 
.do. 
I.39! do. 
I 
1.82 do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
Report D. H. Bark, 
9th Biennial Re- 
port State Engi- 
neer, Idaho, 1911- 
12. 
....do 
.do. 
.do. 
.do. 
Bottom. 
Do. 
Do. 
Bench. 
Average; weeds in canal; 
bench. 
Bench. 
Do. 
Do. 
Do. 
Do. 
Bottom. 
Do. 
Do. 
Do. 
Do. 
Do. 
Measured June 27, 1912, 1 
mile south of Meridian. 
Regular cross - section; 
weeds on bank; first half- 
section in low di.re; used 8 
years. 
Measured June 26, 1912, 3 
miles west of Meridian. 
Deep uniform cross-section; 
some weed growth in chan- 
nel; used 5 years. 
Measured June 28, 1912, 2 
miles west of Meridian. 
Uniform cross-section; par- 
allels a larger lateral 10 feet 
away; used 5 vears. 
Measured Aug. 31, 1912, sta- 
tions 981+72 to 1081+6. Car- 
rying only small part of ca- 
pacity; clean uniform grade 
and cross-section; used 1 
year. 
Measured Aug. 31, 1912, sta- 
tions 889+49 to 981+72. 
Balance same as foregoing. 
Measured Aug. 31, 19i2, sta- 
tions 731+19 to 889+49. 
Balance same as foregoing. 
Measured Aug. 31, 19i2, sta- 
tions 491+84 to 731 + 19. 
Balance same as foregoing. 
Measured Aug. 21, 1912, sta- 
tions 235+11 to 491+84. 
Balance same as foregoing. 
