Three-sided precast concrete bridge structure
| Manufacturer | Description | Approval Date | Restrictions |
|---|---|---|---|
| Conspan Bridge Systems | Arched top | 8/2003 | The gravity anchored wingwall will be evaluated based on scour conditions on a project by project basis. |
| Forterra Arch Bridge | Arched top | 6/2004 | The gravity anchored wingwall will be evaluated based on scour conditions on a project by project basis. |
| Pretek Group LLC | Arched top | 7/2013 | The gravity anchored wingwall will be evaluated based on scour conditions on a project by project basis. |
| Forterra CrownSpan | Flat top | 1/2006 | Approved for CIP wingwall. |
| Oldcastle Precast, Inc. | Flat top | 8/2003 | None |