Many drainage systems require a sump pump:

We will construct a drainage system along a 26 feet long portion of the front, the entire left side, and the rear side up to the left rear corner of the solarium. The system will be comprised of 2 legs, each discharging into a sump located on the left side from where the water will be pumped into the existing pipe that leads to the street. The starting depth for each leg will be 48 inches. We will remove the rear planter up to the brick wall. The owners will remove the plants they wish saved prior to the start of work.

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