Since 1992 Ultrablock, Inc. has manufactured the LOCK-BLOCK® Retaining Wall System.
These blocks are engineered and designed to build segmental modular concrete block retaining walls. In addition to retaining wall blocks, these units are also recommended and are utilized for all types of slope protection, landslide repairs, as an excellent alternative to crib-walls, gabions, rock/boulder walls, and timber lagging. There are a wide variety of uses for Ultrablock units in addition to slope protection including: containment bunkers, bulkheads, seawalls, wingwalls for bridges, barriers, retention ponds, culverts, wine storage facilities, etc. There uses are extremely diversified.

Ultrablock, Inc. currently works with over 62 different production facilities in
     Washington, Oregon, Northern California, Northern Nevada and Arizona.