Maintaining Underground and Aboveground Stormwater Systems

Underground and aboveground stormwater systems are designed with the expectation that regularly scheduled maintenance will be performed during the life of the system. Stormwater systems generally have two intended treatment objectives: quantity and quality. Quantity objectives are to capture stormwater volume during rain events and to slowly meter the stormwater flow to the surface waters of the state. Quality objectives are to provide for pollutant/sediment removal and temperature stabilization before discharge to the surface waters of the state. Without regular maintenance, the system will ultimately fail due to pollutant/sediment buildup and unnoticed/unrepaired system failures, with such failures creating environmental risks and liabilities.

Underground maintenance involves inspection and cleaning of water conveyance systems (catch basins, drop inlets, trench drains, etc.) as well as proprietary underground stormwater management systems. Above ground maintenance is typically concentrated at an aboveground stormwater facility, and includes vegetative maintenance, aquatic nuisance management, and maintenance to flumes, dissipaters, swales, storm pipe inlets and outlets, and outfall devices. 

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Use this guide to understand everything involved in a professionally managed stormwater maintenance program.

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