This document summarizes a study on the effects of surcharge loads on liquefaction parameters of pond ash improved with stone-sand columns. Laboratory tests were conducted on a shake table to measure pore water pressure development in pond ash samples with and without stone-sand column reinforcement under varying levels of surcharge loads. It was found that inclusion of stone-sand columns and application of surcharge loads increased the liquefaction resistance of pond ash, as indicated by a reduction in maximum excess pore water pressure ratios. Higher surcharge loads provided greater improvement to liquefaction resistance.