Using a Spring Under House for Irrigation: Collection and Pumping

Harnessing a Subsurface Spring for Landscape Irrigation

A homeowner has a spring producing 450,000 gallons/year minimum, located 10 feet below ground level under the house, and wants to use it for lawn and garden irrigation.

System Design Requirements

• Collection cistern/well: Install a large-diameter concrete or plastic pipe (culvert section) to capture spring flow and provide pump suction supply.
• Pump selection: Choose a submersible or jet pump sized for your irrigation demand (GPM) and pressure (PSI) requirements.
• Diversion caution: Altering spring flow can cause foundation issues, soil instability, or legal/regulatory concerns. Consult local experts.

Critical Next Steps

Engage a local well/spring specialist familiar with your area's geology and regulations. They can assess sustainable yield, water quality, and design a system that won't create structural problems. Formulas for pump sizing require site-specific data: dynamic water level, drawdown rate, friction losses, and sprinkler system demand.