Quick Answer
A hand-dug well should be at least 10-20 feet deep to reach a stable water table, but the ideal depth depends on the geology and hydrology of the area, as well as the desired yield and quality of the water.
Digging Depth Considerations
When digging a hand-dug well, it’s essential to consider the local geology and hydrology. In areas with hard or fractured rock, a shallower well may be necessary to avoid costly and difficult excavation. In contrast, areas with soft or porous rock may allow for deeper wells. A general rule of thumb is to dig 1-2 feet for every 1 foot of depth below the water table. For example, if the water table is 20 feet below the surface, the well should be at least 40-60 feet deep.
Well Diameter and Liner Considerations
A well diameter of 8-12 feet is recommended for hand-dug wells to ensure adequate yield and stability. A liner or casing should be installed in the well to prevent collapse and contamination. The liner should extend at least 1-2 feet below the bottom of the well and be securely anchored to the surrounding rock or soil.
Well Construction and Maintenance
After digging the well, a wellpoint or pipe should be installed to test the water quality and yield. The well should then be capped and lined to prevent contamination and ensure safe water access. Regular maintenance, including testing and inspection, is crucial to ensure the well remains safe and functional over time.
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