CONCRETE LINING FOE IRRIGATION CANALS. 
measurements — Continued . 
11 
Loss per mile. 
Maxi- 
mum. 
Per 
cent. 
Mini- 
mum 
Per 
cent. 
Per 
cent. 
0.65 
70 
25.30 
9.92 
i 1.11 
3.38 
12.49 
6.08 
15.36 
12.56 
3.25 
14.00 
5.23 
Loss per 
square 
foot of 
wetted 
area in 
24 hours. 
22.1 
3.40 
Cu. feet. 
0.51 
.73 
Character of material 
in the channel. 
Source of informa- 
tion. 
Gravelly soil. 
.do. 
Mostly clay. 
Deep soil . 
Silted. 
Gravel. 
.do. 
.do.... 
.do... 
Very sandy. 
Report L. G. Car- 
penter, Bui. 48, 
Colo. Expt. Sta., 
.do. 
.do. 
.do. 
.do. 
Report H. G. Raseh- 
bacher, O. E. S. 
Cir. 65, 1905. 
do 
.do. 
Report A. E.Wright, 
O. E. S. Cir. 58, 
1903. 
do 
...do. 
...do. 
.do. 
.do. 
.do. 
.do. 
.do. 
Lined with soft, fine 
mud about 0.3 foot 
deep. 
Report \V. F. Bart- 
lett, O. E. S. Bui. 
158, Sep. No. 4, 
1904. 
Remarks. 
Individual measurem e n t s 
show variations of 8.47 per 
cent gain to 8.95 per cent 
loss. 
Individual measurem e n t s 
show variations of 8.77 per 
cent gain to 12.18 per cent 
loss. 
Measured Aug. 2, 1897. 
Lateral of Rio Grande 
Canal system. 
Measured July 13, 1897.2 
Do.2 
Measured July 14, 1897.2 
Do.2 
Measured June 17, 1897. 
Measured June 11, 1897. 
Measured Aug. 4, 1897. In- 
dividual measure m e n t s 
show variations of 5.07 to 
0.24 per cent per mile. 
Measured Aug. 4, 1897. 
Lateral IF part of Rio 
Grande Canal svstem. 
Measured 1893-1894. Aver- 
age for two seasons' con- 
secutive run. 
Usual grade. 
Double usual grade. High 
velocity prevented silting. 
This measurement and pre- 
ceding on different laterals. 
Grade excessive. 
Grade very excessive. 
Grade moderate. Loss most- 
ly in first mile. 
Grade excessive. 
Do. 
Carrying only one-fourth ca- 
pacity; even grade and 
good alignment. 
Do. 
Even grade and good align- 
ment. 
Do. 
Grade very steep, channel 
badly eroded in places. 
2 Measurements taken on abutting sections and given in order. 
