A hand-dug well is a shaft 1.2-1.5 m across, dug with picks and shovels to a depth of about 20 m, lined as it goes down and finished with a sealed top and an apron. It needs no special equipment, but it kills people through collapse, bad air and falling objects, so line every metre before digging the next, force air to the bottom before and during every entry, and never work alone.
Part of Deep Wells
A hand-dug well is a large-diameter shaft excavated by people working at the bottom and hauling spoil by rope. It suits ground that is soft enough to dig and a water table within reach, and it needs labour, a hoist and lining rather than machinery.
The Big Shaft Trades Machinery For Labour And Risk
Choose a hand-dug well when the water table is within the roughly 20 m that can be dug by hand, the ground is soil, sand or soft weathered rock, and you have labour but no drilling equipment. A hole this wide also holds a useful store of water: it fills from the surrounding aquifer and acts as a small reservoir.
If the water is deeper, or the ground is rock, drilling is the alternative: see Percussion Drilling and Augering. The Phase 0 guide Well Digging covers the same method for a first well in the first weeks.
What You Need
- Digging tools — picks, shovels, a crowbar; chisels for hard layers
- A hoist — a tripod with a pulley, or a windlass (Windlass), a bucket and strong rope
- Lining materials — brick, stone or pre-cast concrete rings (Lining As You Go)
- A safety line, a harness and a way to force air to the bottom — a pipe or cloth chute and a bellows or blower (Safety Protocol)
- A crew — someone digging, and at least two above, always
Method: Dig, Line, Haul, Seal
Step 1: Mark and rig. Mark a circle 1.2-1.5 m across. Set up a tripod and pulley over its centre before you dig, so the first bucket comes up on the hoist rather than by hand. Offset the hauling line so it never passes over the digger.
Step 2: Dig and line together. Dig down to the lining and no further than the next section, then line it before going deeper. The safest method is sinking pre-cast concrete rings, 1 m across, 0.5 m tall and 5-8 cm thick: place a ring on the surface, dig beneath it, and let it sink under its own weight, then add the next ring on top (Concrete Rings). Brick lining is the alternative (Brick Lining).
Step 3: Haul. Fill the bucket to about two-thirds so stones cannot fall out, signal, and haul. Dump the spoil well away from the edge.
Step 4: Reach and enter the water. When water begins to enter, keep digging 2-3 m into the saturated zone so the well has a store of water. You will bail continuously while digging this section (Dewatering).
Step 5: Seal the top. Plaster the top 3 m of lining watertight with cement mortar, and pour a concrete apron 3 m across and 10 cm thick around the wellhead, sloping away from it (Well Protection).
Worked Example: How Much Earth, How Much Water
A shaft 1.2 m across has a cross-section of π × 0.6² = 1.13 m². Dug 10 m deep it removes 1.13 × 10 = 11.3 m³ of soil. With a 10 L bucket (0.01 m³) that is 11.3 ÷ 0.01 = 1,130 bucket hauls, before counting the swelling of loose soil, which makes the heap larger than the hole.
Digging 2-3 m into the saturated zone leaves a store of 1.13 × 2 = 2.3 m³ to 1.13 × 3 = 3.4 m³, which is 2,300 to 3,400 L standing in the well before any inflow.
Common Mistakes
- Digging ahead of the lining. Unlined walls collapse without warning. Line as you go.
- Entering without ventilation. Bad air has no warning that is reliable enough to act on; ventilate every time (Safety Protocol).
- Spoil at the edge. Heaped soil adds weight to the wall and falls in. Keep it at least 0.6 m back.
- Stopping at the first water. A well that stops at the first inflow has no reserve and fails in the dry season.
Safety
A well shaft is the most lethal job in this guide
Walls collapse, air at the bottom can be unbreathable, and anything dropped from the top falls on the digger. Line every metre before digging the next, and keep sides sloped or shored in any excavation deeper than 1.2 m. Force air to within half a metre of the bottom for 20-30 minutes before anyone enters and keep it running the whole time. Every digger wears a harness and line tied to the hoist, with two people above. If the digger collapses, haul on the line from above. Never go down to rescue. Tools hang on lanyards, and nobody stands at the edge while someone is below.
What’s Next
- Learn next: Safety Protocol — the full procedure for gas, collapse and rescue
- Combine with: Lining As You Go — holding the walls while you dig