One of the most important changes we made to the Headwaters at the Comal property was removing 85% of the paving that previously covered most of the site. This slows the flow of runoff across the property and allows a significant amount of water to filter into the aquifer through the ground’s natural filtration system. In times of heavy rain, rain gardens and raised bioswales provide additional flood control by steering fast-moving, sediment-laden water away from ecologically sensitive areas.