R&K was contracted to expand a tailings dam for the Sweetwater Mine. The Sweetwater Mine is located outside of Ellington, MO and has been in operation for more than 50 years as part of the Southeast Missouri (SEMO) Lead District. The project consisted of moving 560,000+ CY of material and raising the existing 3,000’ tailings dam by over 20 ft. The impoundment serves as the primary dam embankment for the mine’s 600-acre tailings pond. R&K’s survey and design team worked continually with the owner’s representative making value-engineering proposals and changes to the original design.