Effective Subsurface Retention/Detention Systems

by James E. Milligan, (M.ASCE),

Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water


Stringent environmental regulations and increasing land values have made finding an effective way to manage storm water runoff a high priority for consulting engineers and land developers. Some form of retention or detention is commonly required to manage storm water for most land development projects. Storm water retention or detention systems vary widely in design, from open ponds to subsurface pipe and chamber systems. Subsurface retention and detention offer several advantages in addition to effective storm water management. Because they are below grade, subsurface systems increase the amount of usable land. Parking lots can be built right over top of them. This technical paper describes the design, economics, installation and performance of the Hancor LandMaxTM subsurface retention/detention system.

Subject Headings: Subsurface environment | Stormwater management | Land use | Water management | Runoff | Consulting services | Retention basins | Retaining structures

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