1-3 In Limestone1 3 inch limestone is a versatile material commonly used in construction, landscaping, and other outdoor projects. Its primary purposes include: Drainage and Erosion Control: 1 3 inch limestone is often used in drainage systems, such as French drains, to improve water flow and prevent flooding. Its size allows water to pass through freely while preventing soil erosion. Its also used to stabilize areas prone to erosion, like slopes and riverbanks, by