Grade Stabilization and Structures


Surface inlet with riser. Grassed waterway. Concrete drop box structure.	Surface Inlet with riser at head of waterway with riprap.

Riser for surface inlet

Riser and subsurface tile layout for blind inlet.

Grade control structure. Earthen, wooden concrete or other structure built across a drainage way to prevent gully erosion.

Concrete toe-wall structure.

Aluminum toe-wall structure.

Drop box (culvert inlet).	Culvert Crossing for a ditch with the inlet armored with rock riprap to stabilize the banks.	Drop box (culvert inlet) serving as outlet for tile drains.



Aluminum pipe drop structure during installation showing trash guard, anti-swirl baffle plate, and anti-seep collars.	Corrugated metal pipe drop structure with trash guard and anti-swirl plate.	Corrugated metal pipe drop structure with trash guard.

Pipe drop structure on culvert with metal grate cover and "D" riprap.	Concrete block chute for grade control on end of waterway.

	Concrete box culvert.