Spec InterpretationColorado
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.