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What is the proper sequence of steps to construct a dewatering wellpoint system for a construction excavation? 1. Connect header pipe to suction pumps 2. Jet wellpoints into the ground 3. Connect wellpoints to header pipe with riser 4. Fill annular void with filter media
  1. 1, 2, 3, 4
  2. 3, 1, 2, 4
  3. 2, 4, 3, 1
  4. 1, 3, 2, 4
Explanation
Answer: C- The proper sequence of steps to construct a dewater wellpoint system are as follows:

1. Jet wellpoints into the ground
2. Fill annular void with filter media
3. Connect wellpoints to header pipe with riser
4. Connect header pipe to suction pumps

A wellpoint system used to dewater a construction excavation consists of a series of small-diameter wells that are closely spaced and installed at shallow depths. The wells are connected to a piping system that is attached to a vacuum pump and surrounds the excavation.
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