Southern Drainage Systems designs and installs Drainage Systems, retaining walls, seawalls and erosion control. Drainage Systems, French drains, yard drains and landscape drains are designed and installed to eliminate property flooding, erosion and drainage problems. All come with a 5 year guarantee. Erosion Control systems are installed to prevent and eliminate all types of erosion and land loss, along rivers, ponds, streams, and yards. Seawalls and retaining walls are installed to prevent erosion and land loss along rivers, ponds, lakes and streams, all come with a 15 year guarantee.