At no time will any roof, driveway or foundation drains be allowed to be connected to the sanitary sewer line. If feasible, don’t tie several downspouts together creating concentrated flow in one pipe, but allow for sheet flow through grass or mulch to absorb and divert flow.Īdditional water retention strategies can be used to reduce downslope impacts, such as French drains, soil amendments, rain gardens or similar features. If the slope is toward neighboring properties, drainage should be released so that it will flow away from downslope structures to the maximum practical extent. Roof and surface drainage collected by a system or pipe should be discharged approximately 10 feet from the edge of the property to allow some natural spreading of the water. Concentrated flow shouldn’t be discharged at a neighbor’s property line, or onto the sidewalk, street, curb or gutter.Minor changes in drainage patterns such as modifying the discharge from a downspout, installing a raised planter, or planting or removing vegetation do not require a building permit. Homeowners often have questions about drainage issues between properties.
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