When excavating, what problem does water in the trench create?

When excavating, what problem does water in the trench create?

• A. puddling
• B. unstable soil
• C. makes it unrippable
• D. makes the trench too wide

Answer: (C)

Water in the trench weakens the soil, reducing its shear strength and adding hydrostatic pressure against the walls. This combination makes the trench unstable and prone to collapse. That instability is the key hazard created by water, so the best description is unstable soil. Puddling is related but more about muddy, waterlogged pockets, while the other options don’t capture the main danger—water doesn’t widen the trench or make the soil unrippable.

Water in the trench weakens the soil, reducing its shear strength and adding hydrostatic pressure against the walls. This combination makes the trench unstable and prone to collapse. That instability is the key hazard created by water, so the best description is unstable soil. Puddling is related but more about muddy, waterlogged pockets, while the other options don’t capture the main danger—water doesn’t widen the trench or make the soil unrippable.