Which is the most common type of well construction?

Which is the most common type of well construction?

• A. Dug with a shovel/bucket
• B. Bored with auger
• C. Driven with a drive point
• D. Drilled

Answer: (D)

Drilled wells are the most common type because they reach deeper groundwater and are built with a casing and grout to protect the water from surface contamination and from the borehole walls collapsing. This allows higher, more reliable yields and longer life, which is why modern water systems—municipal and many private supplies—prefer drilled wells. Dug wells are shallow and open to the surface, making them more prone to contamination and limited yield. Driven wells (drive points) work only in very shallow, stable soils and aren’t suitable for deeper, reliable supply. Bored wells with an auger are intermediate in depth but don’t provide the same durability and protection as a properly cased drilled well.

Drilled wells are the most common type because they reach deeper groundwater and are built with a casing and grout to protect the water from surface contamination and from the borehole walls collapsing. This allows higher, more reliable yields and longer life, which is why modern water systems—municipal and many private supplies—prefer drilled wells.

Dug wells are shallow and open to the surface, making them more prone to contamination and limited yield. Driven wells (drive points) work only in very shallow, stable soils and aren’t suitable for deeper, reliable supply. Bored wells with an auger are intermediate in depth but don’t provide the same durability and protection as a properly cased drilled well.