Mexico defeats bulk of NAFTA claim over limestone quarryVulcan set up a lime stone quarrying enterprise for export to the US (Credit: Shutterstock/George Wirt)Vulcan set up a lime stone quarrying enterprise for export to the US (Credit: Shutterstock/George Wirt)A US construction materials company has been awarded “negligible” damages in a NAFTA claim against Mexico over measures affecting its limestone quarrying operations – a case previously valued at more than US$1.9 billion.