In civil engineering and building construction, a "sump" refers to a designed excavation, pit, or basin created at a low elevation to collect, manage, and remove unwanted surface water, groundwater, or construction runoff. Contractors install temporary or permanent sumps during foundation excavation and basement construction to keep work areas dewatered. Additionally, permanent sanitary or storm sumps are integrated into commercial building designs to collect drainage before pumping it up to municipal sewer mains.
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