Robert and Sara Moore, Taft
- Category: Residential
- Construction Team: Mr. Ron Dunagan, Registered Builder, R & S Contracting, P.O. Box 117, Fulton, Texas 78358
- System Location: 252 Retreat Drive, Taft, Texas 78390
- Capacity: 123,500 gallons: 77,500 gallons (non-roof) and 46,000 gallons (roof)
- Water Use: Potable and non-potable
Background and System:
When the Moores decided to build a home close to the water on the Gulf of Mexico, they realized that municipal water supply would not be available. Additionally, the quality of groundwater at the site was not fit for use. As a result, they decided to install a rainwater harvesting system to supply water for their needs, potable and non-potable.
For their non-potable supply, they constructed a rainwater catchment pond. The depth of the pond was limited to 5 feet because of the shallow water table. One inch of rainfall produces about 10,000 gallons of water in the pond. The capacity of the pond is estimated at 77,500 gallons. With an average annual rainfall of 20 inches, they expect the pond to provide an adequate freshwater irrigation supply year-round. When the catchment pond is full, overflow is carried through a concrete spillway to an input ditch to prevent erosion. Excess rain is carried directly to an adjoining bay through PVC pipes.
The 2,400-square-foot concrete roof over the house serves a catchment surface for water to be used indoors. Six-inch diameter seamless powder-coated aluminum gutters and eight 3-inch-diameter PVC downspouts carry the water from the roof to a cistern located under the house. The new home literally sits atop this cistern. The roof can collect about 1,500 gallons of water per inch of rainfall. At full capacity, the cistern which can be accessed through a hatch located inside the home can store 46,000 gallons of water.
Sediment filters and ultraviolet lamps treat the water before it is used inside the home.