The Springville Marsh project reduces phosphorus runoff by including 65-acres of former cropland in the partial restoration of the historical Big Spring Prairie, a former large, wet prairie/fen/marsh complex. Restoration work included removing underground drainage tiles in frequently flooded land adjacent to the Springville Marsh State Nature Preserve, controlling invasive species, and planting native prairie vegetation with burr and white oaks on the uplands. Project improvements have also provide additional habitat for rare wildlife and plant species.