Standard Details and Specifications

The Commissions' consultants have assembled the following stormwater BMP standard detail drawings, specifications, and SOPs for your reference and use. They reflect years of design and construction experience and accumulated best practices. Use of these standard details is not required, however, if you will be amending soil on site for infiltration credit you must use this specification and pass the inspection test, and bioretention practices must meet the bioretention inspection test.

• Amended Topsoil Specification
• Amended Topsoil Inspection SOP
• Bioretention Basin
• Bioretention Swale
• Bioretention Trench
• Bioretention Inspection SOP
• Filtration Shelf
• Minnesota Filter (Iron Filing) Trench
• Off-Line Biofiltration Basin
• Outlet Structure
• Porous Pavement
• Porous Pavement Specification
• Rain Garden
• Slotted Barrel Drywall Manhole
• Stauner Sediment Trap
• Tree Trench
• Structural Soil Specification
• Infiltration in a DWSMA
• Trail/Sidewalk Infiltration Options

If you have any questions about the details or would like to obtain the underlying drawings or documents, please contact the Commissions' consultants:

Ed Matthiesen
Wenck Associates
ematthiesen@wenck.com
763.252.6851        

Diane Spector
Wenck Associates
dspector@wenck.com
763.252.6880

An infiltration swale

A boulevard bioinfiltration basin

Installing an infiltration trench.