The ditch remediation planned is the first large-scale implementation of a technique originally developed and pilot-tested in the Great Marsh, where small patches of salt marsh hay is cut and raked into adjacent ditches, and held by twine. Filling the ditch with cut hay traps sediment in the water column, which slowly fills and heals the ditch over time. After two to three years of treatment, ditches are shallow enough to support the growth of cordgrass (Spartina alterniflora), which continues to trap sediment and produce biomass. The goal of these restoration efforts is to reverse the subsidence (i.e., sinking) of the marsh platform and increase accretion, the process of maintaining the elevation of the marsh platform relative to sea level rise.