Education Center Cisterns - North Carolina Botanical Garden at Univ. of NC at Chapel Hill
There are 7 above ground and one below ground cisterns at this LEED certified green building. The total capacity is about 54,400 gallons of rainwater. The 27,000 square feet of roof surfaces drains into them. A 1-inch rain generates 16,786 gallons of water. 2.4 inches of rainfall will fill them to capacity. Overflow is directed to 11 onsite bio-retention areas to allow water to slowly soak into the ground.