Historical type of wells,
Larger diameter (18-48 inch).
Curbing material is usually concrete crocks with loose joints.
Water enters well through loose casing joints.
Older dug wells were hand-dug.
Some were installed with bucket augers.
Low well yield, but casing stores 100’s of gallons.
Highly vulnerable to contamination
Large Diameter Low Yield Wells
Installed in low yield areas
Casing material is slotted fiberglass (National Sanitation Foundation certified). Upper 25 feet of casing is grouted.
More sanitary than old dug wells.
Requires unique pitless adapter (due to corrugated casing wall).
Only allowed under a deviation where conventional wells can not be drilled.