As part of the improvements on IDOT Contract 61D22, a water passage system consisting of hollow, rectangular four-sided precast concrete culvert structures was incorporated. | Utility Concrete Products
Precast concrete box culvert - MC series - CPM Group Ltd
Box Culverts | A&R Concrete Products
Box Culvert - Permatile Concrete Products Company
Taking Notice: Is that a Bridge or a Culvert? - Ayres