10 
BULLETIN 1177, U. S. DEPARTMENT OF AGRICULTURE. 
ment, and the accompanying chart (Fig. 3) gives the respective rates 
of formation of these classes to the present time. Attention is 
called particularly to the percentages of totals given in the last line 
J 00 
90 
£80 
i£70 
|60 
V 4 
q530 
10 
1 
Total Number of Districts 
——Supplemental Development or 
Acquisition of Existing Systems 

Vew Development 
I 
A 
I 
1 
i 
\\ 
, 
\\ 
/, 
f t 
1 
\\ 
r 
/■ 
/ 
f 
\ 
+* 
■is* 
L 
^ 
"*V 
A 
^ 
^ 
\.. 
''•• 
■' 
m 
m" 
-* 
f^COC^O^^oo^io^^^^O^fM^^-^^f^coOiCCj^fXjO^^j. Ia to K Ch °) ° ^ 
03 00Q3 ) 0)0)0 ) 0)0)0)OlO)0)OOOOOOOOOONN\NN.SN\NNt\lf\l 
co^<^coQOQDCoct>coCQcoc^coO)Coc^o>0)C^O)0)0^cr)c^cNO)C^<^^ 
Year of Formation 
Fig. 3.— Rate of formation of irrigation districts in the United States according to the type of pro- 
posed development. Points on each year-line represent the number of districts of each class and 
the total formed that year. 
of the table, which indicate a much more favorable situation gener- 
ally in the class of districts formed for supplemental purposes than 
in the other class. 
Table 3. — Stains December SI, 1921, of irrigation districts in the several States classi- 
fied according to purpose of formation. 
Purpose of formation. 
All distri 
Entirely new 
ment 
develop- 
Supplemental develop- 
ment or acquisition 
existing works. 
its. 
State. 
ti 
a 
"5 
CD 
O 
A R 
3.2 
. o 
R cc 
P 
<a 
R b* 
P-i 
ed 
> 
2 
"3 
.3 
03 
ft 
o 
§1 
L. ° 
■§ s 
q to 
p 
R . 
5 bi) 
c3 
"3 
o 
H 
tab 
03 
(D 
Pi 
o 
eg 
c.2 
o R 
R oo 
P 
o 
"3 ^ 
R W) 
Ph 
> 
e3 
R 
"c3 
O 
EH 
1 
8 
6 
G 
..... 
4 
14 
3 
34 
33 
6 
8 
61 
39 
22 
1 
29 
20 
31 
1 
66 
36 
47 
2 
37 
26 
37 
""ii" 
4 
35 
3 
44 
49 
8 
q 
6 
21 
10 
16 
2 
127 
75 
Idaho 
Kansas 
1 
9 
4 
10 
5 
19 
69 
2 
4 
19 
5 
4 
26 
8 
22 
21 
2 
4 
2 
2 
3 
8 
2 
2 
3 
5 
35 
31 
4 
4 
2 
1 
33 
24 
25 
2 
4 
2 
2 
3 
27 
2 
2 
8 
9 
..... 
61 
Nebraska 
39 
Nevada 
4 
New Mexico 
2 
2 
6 
North Dakota 
2 
Oklahoma 
1 
16 
"*2" 
1 
31 
..„. 
1 
8 
4 
15 
6 
33 
14 
1 
22 
5 
66 
South Dakota 
Texas 
2 
1 
4 
9 
3 
3 
5 
37 
4 
13 
6 
31 
2 
1 
...... 
1 
1 
7 
9 
3 
2 
3 
5 
48 
13.7 
17 
16 
51 
6 
13 
40 
3 
244 
40.8 
3 
1 
1 
7 
27 
3 
3 
7 
14 
3 
20 
Utah 
1 
9 
1 
46 
18.5 
21 
1 
18 
88 
10 
13 
5.2 
Total 
79 
31.9 
110 
44.4 
248 
100 
198 
56.5 
24 
6.9 
80 
22.9 
350 
100 
37 
6.2 
159 
26.6 
158 
26.4 
TOR 
Per cent of total.. 
100 
