Colorado

State of Colorado

Department of Transportation Specifications

December, 2011

CDOT

Colorado DOT appears to follow AASHTO 1992 Guidelines for geotextiles.

SPECIFICATION APPLICATION NON WOVEN WOVEN COMPOSITE GRID
712-7 Weed Barrier US 80NW -- -- --
712-8 Separator Class A US 180NW US 315 -- --
712-8 Separator Class B US 120NW US 200 -- --
712-6 Paving Geotextiles US 100P -- -- --
712-3 Drainage Geotextiles Class A US 180NW -- -- --
712-3 Drainage Geotextiles Class B US 80NW -- -- --
712-2 Erosion Control Geotextiles Class A US 205NW US 200 -- --
712-2 Erosion Control Geotextiles Class B US 90NW US 150 -- --
More resources may be found on the web:
State QPL information:
NOTES:

•  The above information is to be used only as a guide.

•  Products on the above list can change without notice.

•  AOS must be greater than that of soil k fabric > k soil for all classes of Separator, Drainage & Erosion Control.

•  US 200 is currently under evaluation for approval.