30 
BULLETIN 1279, U. S. DEPARTMENT OF AGRICULTURE 
Table 11. — Rural road mileage by types and highway systems as existing January 1, 
1922, and mileage of each type built during 1921 in each State — Continued 
COLORADO 
State roads 
County roads 
Forest roads ' 
All rural roads 
Type 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Unimproved earth . . . 
Miles 
297.5 
4, 794. 3 
1, 180. 
780.9 
892.7 
131.1 
70.4 
Miles 
Miles 
19, 422. 2 
17, 500. 
350.0 
289.8 
2, 433. 8 
Miles 
3 288.0 
1, 476. 4 
Miles 
4,866.9 
2, 326. 5 
101.9 
Miles 
Miles 
19, 719. 7 
22, 294. 3 
1, 530. 
1, 070. 7 
3, 326. 5 
Miles 
2 288 
Partly graded and 
drained earth 
40.9 
50.0 
1 476 4 
Earth to definite 
grade with perma- 
nent drainage struc- 
tures 
175.4 
99.4 
104.3 
175 4 
Sand-clay 
80.0 
89.7 
179 4 
Gravel 
194 
Waterbound mac- 
adam 
131.1 
71.0 
Portland cement con- 
crete 3 
26.7 
.6 
26. 7 
Total 
8, 146. 9 
405.8 
39, 996. 4 
1, 934. 1 
7, 331. 5 
90.9 
48, 143. 3 
2, 339. 9 
1 Included in State or county roads. 
s New roads laid out but not improved. 
3 Includes bituminous concrete. 
CONNECTICUT 
State roads 
Town roads 
All rural roads 
Type 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Unimproved earth 
Miles 
Miles 
Miles 
124 3 
8, 777. 7 
868.1 
459.4 
177.0 
36.8 
70.4 
4.0 
20.4 
37.0 
.8 
6.7 
Miles 
Miles 
124.3 
8, 777. 7 
1, 043. 5 
793.7 
772.7 
36.8 
210.9 
4.0 
119.6 
172.4 
2.2 
94.1 
Miles 
Partly graded and drained earth 
Earth to definite grade with permanent 
175.4 
334.3 
595.7 
1.0 
36.1 
17.0 
1.0 
7.8 
1. 
Gravel. . 
9.7 
31.1 
45. 8 
Waterbound macadam 
48. 1 
Surface-treated macadam 
1. 
B ituminous macadam 
140.5 
34.5 
42.3 
Sheet asphalt 
Bituminous concrete .. 
99.2 
135.4 
1.4 
87.4 
1.6 
52.4 
1.8 
2.4 
.2 
4.7 
3. 4 
Portland cement concrete. 
54. 8 
Brick.. 
. 2 
M iscellaneous 
4. 7 
Total 
1, 569. 3 
129.3 
10, 582. 6 
72.0 
12, 151. 9 
201.3 
DELAWARE 
State roads 
State-aid roads 
County roads 
All rural roads 
Type 
Total i 
Jan. 1,1922 
Built 
1921 
Total 
Jan. 1,1922 
Built 
1921 
Total 
Jan. 1,1922 
Built 
1921 
Total 
Jan. 1,1922 
Built 
1921 
Miles 
Miles 
Miles 
Miles 
Miles 
3, 485. 9 
50.0 
15.8 
150.0 
18.0 
20.0 
2.5 
.5 
Miles 
Miles 
3, 485. 9 
50.0 
15.8 
150.0 
31.8 
20.7 
171.8 
6.9 
Miles 
Gravel 
4.5 
2.8 
3.0 
4.2 
5.2 
2.0 
4.5 
Waterbound macad- 
2.8 
Surface-treated ma- 
cadam 
3.0 
2.4 
.7 
124.9 
6.4 
11.4 
2.0 
6.2 
5.2 
Portland cement con- 
33.4 
.2 
44.4 
23.2 
58.6 
Brick 
.2 
Total 
134.4 
33.6 
55.8 
25.2 
3, 742. 7 
21.7 
3, 932. 9 
80.5 
1 Includes only mileage actually constructed and taken over by State. 
