APPROVED SOURCES

DRY CAST, SEGMENTAL & MODULAR RETAINING WALLS

The following producers are approved to furnish segmental and modular block retaining walls on the basis of certification in accordance with the Iowa DOT Specification requirements.

MANUFACTURER

Kings Materials, Inc.

Keystone Retaining Wall System (Dry Cast)

650 12^th Avenue SW

PO Box 368

Cedar Rapids, IA 52406

319-363-0233