Case Studies

Seneca Rocks Discovery Center Soil Subsidence Repair

Soil subsidence and erosion caused voids that needed to be filled beneath the Center's concrete slab foundations. 
About The Project
Contractor Mid-South Concrete Leveling
Project Location Seneca Rocks, WV
Product Used Terrathane™ 24-003


  • Soil Subsidence and erosion caused voids beneath the Seneca Rocks Discovery Center’s concrete slab foundations
  • Some slabs were left with dips of up to 3”
  • Settlement occurred in the Center’s conference rooms, hallways, bathrooms, and patio, causing tripping hazards


  • Remove existing caulking and drill 5/8” holes through the slabs, causing little dust or disruption
  • Inject the TerraThane 24-003 geotechnical polyurethane underneath the slabs to stabilize, voidfill, lift, and level the slabs
  • Add drainage, new caulking and cleanup the areas with minimal disruption to the center’s activities


  • Filled all voids and leveled slabs
  • Added minimal weight to the area when compared to concrete grout (4lbs vs 130lbs)
  • Tripping hazards were mitigated
  • Completed in 3.5 days
  • Saved thousands of dollars by avoiding replacement or versus alternative methods

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