We love our horses too. Building a custom barn or arena needs to be done with the owner’s needs, horse and the weather in mind. We install French drains in all stalls and around arenas to help with drainage. A French drain is a trench filled with gravel or rock or containing a perforated pipe that redirects surface water and groundwater away from an area. A French drain has perforated hollow pipes along the bottom to quickly vent water that seeps down through the upper gravel or rock.