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Ladue Road is now open in all directions. The city closed a portion of Ladue Road east of New Ballas in both directions for emergency repairs. The project was the largest and most significant roadway repair that the city has needed to complete this year. The total cost of the project is about $819,000, all of which was funded through the city’s reserve fund that was established years ago for a roadway emergency such as this. Thanks to this fund, none of the city’s planned pavement maintenance programs were delayed due to this project.
City staff first noticed the trouble when they found a crack in the Ladue Road shoulder on May 5. Investigation found similar cracks and sunken areas in the dirt along about 500 feet next to Ladue Road. The situation was serious: the hillside supporting Ladue Road was sliding, and it was taking the road with it. Cracks in the roadway were becoming worse – with noticeable change on a daily basis – meaning that the failures were just the beginning of what was to come.
The city acted immediately to determine a solution to the problem. Through soil samples, survey of the hillside, and geotechnical consulting, the city found that the support for Ladue Road needed to be isolated from the adjacent hillside. This support would need to come from the rock about 25 feet below the surface.
The most economical way to do this was to drill into the rock below. Seventy 45-foot piers were drilled into the hillside so that they would be embedded 20 feet into the rock and provide the support that Ladue Road needed. Another 70 piers were constructed to create a second row of columns to provide a continuous underground wall to prevent further movement below the pavement. Ladue Road is now well supported and will remain so for decades to come.
Once the roadway was stabilized, attention shifted to repairing and restoring Ladue Road for traffic. Utility and roadway repairs began the day after the piers were completed and continued through the end of September. The restoration efforts included a new gas main by Laclede Gas, stormwater improvement by the Metropolitan Sewer District, and city contracts for new curb, guardrail, asphalt repairs, and other roadway repairs.
The city appreciates all who assisted with this project and is especially grateful to the community for enduring the detour over the summer.
For more information, contact Jim Heines, Director of Public Works, at firstname.lastname@example.org or (314) 872-2638
Ladue Road in Creve Coeur nears shutdown for major road repairs
via KTVI - Fox 2 http://fox2now.com/2017/07/07/ladue-road-in-creve-coeur-nears-shutdown-for-major-road-repairs/