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− | It is ''HIGHLY RECOMMENDED'' that the outlet for the infiltration practice shall safely convey stormwater using all of the following mechanisms ([ | + | It is ''HIGHLY RECOMMENDED'' that the outlet for the infiltration practice shall safely convey stormwater using all of the following mechanisms ([https://dnr.wi.gov/topic/Stormwater/standards/postconst_standards.html Stormwater post-construction technical standards, Wisconsin Department of Natural Resources Conservation Practice Standard]). |
:'''Drawdown valve''': [[Glossary#I|infiltration]] systems may be designed with a drawdown valve for the removal of standing water for maintenance and winter diversion. | :'''Drawdown valve''': [[Glossary#I|infiltration]] systems may be designed with a drawdown valve for the removal of standing water for maintenance and winter diversion. | ||
:'''Emergency spillway''': {{alert|A means to release discharge in excess of the infiltration volume safely into the downstream stormwater conveyance system is ''REQUIRED''.|alert-danger}} | :'''Emergency spillway''': {{alert|A means to release discharge in excess of the infiltration volume safely into the downstream stormwater conveyance system is ''REQUIRED''.|alert-danger}} | ||
:'''Freeboard''': It is ''HIGHLY RECOMMENDED'' that two feet of freeboard be provided from the 100-year flood elevation of the infiltration practice to the lowest basement floor elevation of residential, commercial, industrial and institutional buildings located adjacent to the BMP, unless local requirements recommend otherwise. | :'''Freeboard''': It is ''HIGHLY RECOMMENDED'' that two feet of freeboard be provided from the 100-year flood elevation of the infiltration practice to the lowest basement floor elevation of residential, commercial, industrial and institutional buildings located adjacent to the BMP, unless local requirements recommend otherwise. | ||
:'''Drop Structure''': Infiltration trenches or subsurface infiltration systems may be designed with a drop structure sized to handle the overflow. This additional volume of stormwater may be directed into the existing stormwater system or it may be diverted to a downstream BMP. | :'''Drop Structure''': Infiltration trenches or subsurface infiltration systems may be designed with a drop structure sized to handle the overflow. This additional volume of stormwater may be directed into the existing stormwater system or it may be diverted to a downstream BMP. |
It is HIGHLY RECOMMENDED that the outlet for the infiltration practice shall safely convey stormwater using all of the following mechanisms (Stormwater post-construction technical standards, Wisconsin Department of Natural Resources Conservation Practice Standard).