Project Examples

Commercial Projects

Schnucks, Twin Oaks, MO The owner at this site requested that the Keystone wall units face the bedrock cut to reduce the expensive bedrock excavation and to prevent rocks from falling on the proposed parking lot. The engineered retaining wall solution attached the wall to the bedrock with a geogrid connection to steel rods that are grouted into the bedrock.
Eckelkamp Parking Garage, Des Peres, MO This Versa-lok wall replaced a proposed reinforced concrete wall which was designed as a grade separation between the lower level of the parking garage and the street entry to the second level. The project had several unique utility penetrations through the wall.
Grindstone Plaza, Columbia, MO This Versa-lok Mosaic wall provided an attractive retaining wall solution for this commercial project. The retaining walls were required to protect the waterways that flowed through the site.
Kohls, Arnold, MO This site expected to encounter a bedrock excavation at the back of the site. During construction the owner found a void in the bedrock that needed to be supported. The block wall abutted the bedrock on two sides of the void and created a stable and attractive wall layout.
Southwest Bank, Des Peres, MO This retaining wall is a testimony to the long term performance of block walls. The wall was one of tallest walls in the area at the time it was constructed. The challenges of the site included the tiered wall design and global stability design.
Cumberland Falls, KY This Keystone Century wall was the State of Kentucky’s choice for replacing the existing aging wall with a long term solution that provided an attractive retaining wall for this historic location.

Transportation Projects

Metrolink at Manchester, St. Louis, MO The St. Louis extension of the Metro required over 25 retaining walls in various applications such as support of bridge approaches, supporting new stations, and attractive landscape walls. The project required many engineering and construction challenges.
Metrolink at Enterprise, St. Louis, MO This grade separation required that an existing concrete wall remain in place and a new wall be constructed a few feet in front of the existing wall. The new Keystone wall required unique engineering solutions to solve the global stability difficulties and create a new wall in limited space due to the existing buildings.
Metrolink, Belleville, IL This project consisted of +20 very tall walls with significant global stability design issues. The walls were installed around 1999 and are a testament of the long term performance of Keystone wall used in critical applications.
Eads Bridge, East St. Louis, MO This MSE panel wall is on the south side of the approach to the historic Eades Bridge. The wall is a complicated layout that provides an attractive wall at the riverfront.
MoDOT Route 141, Manchester, MO This Hercules retaining wall created a vegetated grade separation on the MoDOT project. The sloped and tiered walls were required by the City of Manchester to increase the green space at this site.
MoDOT Route 5, Camdenton, MO This MoDOT MSE wall is concrete panel system with steel reinforcements. The site is a grade separation for a bridge approach. The slopes above the wall are over 50’ tall and steeper than 2:1 slopes.
Clay Ave. Bridge, Kirkwood, MO This Versa-lok wall forms the abutment for a bridge overpass at a historic site in downtown Kirkwood. The walls are constructed to a complicated layout designed by Booker Associates.
Prescot Plaza, Kansas City, KS This Big Block wall is an attractive wall system with wall units that are 18” tall x 48” wide. The utility companies required that there be no geogrid in the top 6’ of the retaining wall so they could excavate as required for utility installation and maintenance. Not a problem with Big Block wall units.

Temporary Retaining Walls

Lambert Airport Temporary Wall, St. Louis, MO The contractor required a bridge so that large excavation equipment could operate without interfering with the automobile traffic on the roadway that crossed the site. Temporary walls were constructed at each side of the bridge to minimize the bridge costs.
Clayton Road, Wildwood, MO Upgrading Clayton Road required that the traffic remain open on the existing roadway while the fill was placed to construct the new roadway. Wire facing units and geosynthetic reinforcements were used to create the temporary retaining wall.

Zero Pressure Walls

KCI Airport, Kansas City, MO This project required that a permanent wall system be constructed so no soil loads be applied the concrete building walls. The MSE solution utilizes galvanized wire facing units and geogrid reinforcements to meet the project requirements.
Express Scripts, St. Louis, MO The parking garage design and construction schedule required that a MSE wall be constructed to eliminate the soil loads on the concrete wall. A wire faced geogrid reinforced wall met the project design requirements and provided a construction friendly and budget friendly system.