The construction team is coordinating a method decision because groundwater must be lowered before footing work starts. Which water-control method is best?
Correct Answer
B) wellpoints or sump pumping as designed
wellpoints or sump pumping as designed best matches the stated condition. The other choices are real construction options in the same family, but they fit different field conditions.
Why This Is the Correct Answer
wellpoints or sump pumping as designed best matches the stated condition. The other choices are real construction options in the same family, but they fit different field conditions.
Why the Other Options Are Wrong
Option A: eductor system for low-permeability soil
eductor system for low-permeability soil addresses a neighboring field issue, but not the condition or method control required for temporary dewatering.
Option C: cutoff trench or cutoff wall
cutoff trench or cutoff wall addresses a neighboring field issue, but not the condition or method control required for temporary dewatering.
Option D: gravel working mat after water control
gravel working mat after water control addresses a neighboring field issue, but not the condition or method control required for temporary dewatering.
Memory Technique
The field condition asks; temporary dewatering answers in work boots for Foreman Selecting.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Earthwork methods; excavation water control and temporary dewatering; verify the construction method, material selection, equipment choice, or work sequence that fits the field condition.
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