A watertight enclosure pumped dry to permit construction work below the waterline, as when building bridges or repairing a ship.
- ‘The 1,050 mm diameter outfall on the west side of the airfield required a temporary cofferdam during its construction.’
- ‘The construction scheme employed on the bridge consisted of cofferdams for the drilled shaft foundations, and climbing forms for the tower construction.’
- ‘Its diversion tunnel is accompanied by upstream and downstream cofferdams that permit construction of the main dam.’
- ‘Right outside my window is the cofferdam they're building so they can repair it.’
We take a look at several popular, though confusing, punctuation marks.