Underground Detention Facilities

Underground water detention facilities are vaults, pipes, tanks, and other subsurface structures, designed to temporarily store stormwater runoff for water quantity control. Like aboveground detention ponds, underground detention facilities are designed to drain completely between runoff events, thereby providing storage capacity for subsequent events. Underground detention facilities are intended to control peak flows, limit downstream flooding, and provide some channel protection.

Not to be confused with:

  • Detention Pond
  • Retention Pond