Shallow Well Digging for Water Access

Before You Dig: Site Assessment

Digging a well without site assessment wastes significant effort and may produce contaminated water.

Critical separation distances (minimum standards):

• Privy, outhouse, latrine: 100 feet minimum (150 feet preferred)
• Animal pens, corrals, feedlots: 100 feet
• Septic tank: 50 feet
• Septic drain field: 100 feet
• Fuel storage tanks: 100 feet
• Road or paved surface: 50 feet
• Downhill from all contamination sources — water flows downhill

Locating high-probability well sites:

• Near existing seeps or springs (indicates shallow water table)
• In topographic depressions where water collects
• Near stream banks or floodplains (water table often shallow)
• Where vegetation indicates consistent groundwater (willows, cottonwoods)
• Where neighbors have productive shallow wells

Local information: Talk to neighbors, local farmers, or your county extension office about typical water table depths and well success rates in the area. This information is worth far more than any general guide.

What to do if the water table is too deep: Hand-digging is practical only to about 30 feet of depth. Beyond that, the work becomes heroic and the structural safety of a deep hand-dug well becomes questionable. If your area's water table is deeper than 30 feet, a driven well point (for sandy/gravelly soil to ~25 feet) or a professional drilled well is the practical path.

Dug Wells

A dug well is a large-diameter hole (typically 3-5 feet across) excavated to below the water table, lined and sealed to protect water quality.

Construction

Materials:

• Concrete culvert sections or rings (pre-cast well rings) — the standard lining
• Gravel or coarse sand for the bottom filter layer
• Concrete for the surface slab and seal
• A well cover (watertight, lockable lid)

Digging:

Safety while digging: Hand-dug wells are confined space hazards. Toxic gases can accumulate (hydrogen sulfide, carbon dioxide displacing oxygen). Test with a candle before entering — if the candle goes out, the oxygen level is insufficient for human entry. Have continuous ventilation (a fan blowing down) when workers are in the hole.

Protecting Water Quality

The primary seal: From 2-10 feet below the surface, the space between the well rings and the native soil should be grouted with bentonite clay or cement to form an impermeable seal. This prevents surface water from migrating down along the outside of the casing into the water supply.

Surface drainage: Water must drain away from the well on all sides. An apron that slopes outward at least 10 feet prevents surface runoff from pooling near the well.

Cover: The well must have a watertight cover. An open well is an invitation for surface contamination, animals, insects, and debris. Pre-cast well rings typically have a matching lid available.

Driven Well Points

For sandy, gravelly, or loamy soils with a water table within 25 feet, a driven well point is faster and less labor intensive than a dug well.

Materials:

• A stainless steel or brass well screen/point (1 1/4" or 2" diameter, 24-36" long)
• Sections of galvanized steel pipe in the same diameter (in 5-foot sections)
• Pipe couplings
• A drive cap (a fitting that protects the pipe threads during driving)
• A post driver or heavy sledgehammer

The process:

1. Attach the well point screen to the first section of pipe
2. Position over the desired location and begin driving with the post driver — straight, plumb blows
3. Add pipe sections and couplings as the point descends
4. Test periodically by pouring water in the top — if it runs out easily, the point is in permeable material. If it backs up, the soil is too tight and the technique may not work here.
5. Continue driving until the point is 5-10 feet below the water table (you'll know you've hit water when mud or water rises in the pipe)
6. Attach a pitcher pump or hand pump directly to the top of the pipe

Soil requirements: Driven well points require permeable soil — sand, fine gravel, or sandy loam. Clay soil stops the point and resists water entry through the screen. In rocky or clay-heavy soil, driven points don't work.

Depth limit: Atmospheric pressure limits suction-based pumping to 25 feet of lift. This means your water table must be within 25 feet for a pitcher pump to work. A good driven well site: water table at 15-20 feet in sandy soil.

After Construction: Water Quality

All new wells require treatment before first use:

Shock chlorination: Pour a concentrated bleach solution (1 quart of plain bleach diluted in 5 gallons of water, for a dug well) down the well, circulate it throughout the system (pump it up and let it drain back several times), and let it sit for 12-24 hours. Then pump out the chlorinated water until the chlorine smell dissipates.

First water test: Test for coliform bacteria and nitrates before using for drinking. This is the minimum acceptable standard before depending on a new well.

Ongoing testing: Test annually at minimum, and after any flooding event or nearby contamination event.

Limitations and Honest Expectations

A hand-dug well or driven well point is a resource-intensive undertaking. A dug well to 25 feet with one or two workers takes 2-5 days of significant labor. It requires the right soil and geology. It has more contamination vulnerability than a drilled well.

For a fixed homestead or community situation with time, labor, and suitable geology, it's entirely achievable. In an acute emergency where you need water now — it's not the answer. That's what storage and treatment are for.

The appropriate framing: a hand-dug well is a preparedness project done in advance, before the emergency, when you have time and resources to do it properly.