Crushed Gravels:

Designation 2 Class 20 Granular Base Course
Designation 2 Class 20
Designation 2 Class 25 Granular Base Course
Designation 2 Class 25
Designation 2 Class 40 Granular Base Course
Designation 2 Class 40
Designation 4 Class 20 Granular Base Course
Designation 4 Class 20
Designation 4 Class 40 Granular Base Course
Designation 4 Class 40
Designation 6 Class 80 Granular Base Course
Designation 6 Class 80