Dewatering keeps excavations stable and work moving.
In this article
Groundwater
Know the levels.
Stability
Water weakens soil.
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Pumps
Sized properly.
Permits
Discharge rules.
Monitoring
Levels and sediment.
A closer look
Unexpected groundwater can stall excavation and foundations for days. Geotechnical reports give early warning. Planning pumps, discharge routes and permits before excavation keeps the schedule intact.
Where to start
Review the geotechnical report for groundwater levels before planning excavation.
An example
A contractor planned dewatering from the geotechnical report. When water appeared, pumps were ready and work continued.
Common mistakes
Ignoring geotechnical data, illegal discharge and undersized pumps.
What to track
Track pump hours, water levels and permit compliance.
Questions to ask
What does the geotechnical report say about groundwater? Where will pumped water go? Do we need a permit? Who monitors pumps overnight and on weekends?
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Frequently asked questions
Do contractors need permits for dewatering?
Often, yes. Discharging pumped water may require permits and treatment depending on location and water quality.