Redi-Rock Gravity Walls Minimize Footprint over Lake Corridor
During a road-widening project in Lacey, WA, the design team was challenged with a portion of roadway crossing a lake. The road's footprint had to be minimal and multiple utilities had to be integrated into the same corridor.
To achieve all of the requirements for the stretch of roadway, a Redi-Rock gravity retaining wall system was selected. Redi-Rock met the project's structural requirements, did not require tie backs, and met the seismic code.
Where the road crossed Lake Lois, engineers designed Redi-Rock headwalls to flank a corrugated culvert to allow water to flow between the two sections of the lake. "The submerged, tiered, soil reinforced walls crossing the lake are fairly unique. We don't see that combination very often," explained project engineer, Dean M. White, P.E. of E3RA Inc.