USDCM Vol. 3 Updates

USDCM Vol. 3 Ch. 4 Update

Overview and Purpose

The Urban Storm Drainage Criteria Manual (USDCM), Volume 3, first released in 1992, has been updated several times over the course of 18 years as stormwater quality practices advance.  MHFD is currently updating chapters 4 and 6 which cover the design and maintenance of stormwater best management practices (BMPs), also referred to as stormwater control measures (SCMs). This update is an open collaborative process with over 70 stakeholders including local and state governments, academics, consultants, engineers, landscape architects, suppliers, trade associations, manufacturers, and contractors.

The goals of this effort include engaging a large and diverse group of stakeholders to identify gaps, update the criteria, and provide clear guidance on the intent of the criteria while allowing for flexibility and innovation. Stakeholder groups for the V3Ch4 update include: MS4 Design Standards, Grass Buffers & Grass Swales, Bioretention / Sand Filters, Green Roofs (or Blue Roofs), Extended Detention Basins, Retention Ponds, and Constructed Wetland, Permeable Pavements, and Proprietary SCMs & Underground BMPs.

Stakeholder Involvement

The following sections are available for review and the drafts are available in the tiles below the timeline.

  • Draft Upfront Sections – comments ongoing
  • Draft Fact Sheet for Receiving Pervious Areas including Grass Buffers and Swales – comments due September 30, 2021
  • Draft Fact Sheet for Bioretention – comments due October 21, 2021
  • Draft Fact Sheet for Sand Filters – comments due October 21, 2021
  • Green and Blue Roofs – comments due November 19, 2021

Criteria Update Timeline

Criteria Update Timeline

Additional Information

To request additional information about the update: please contact Morgan Lynch, P.E., CFM  at mlynch@mhfd.org

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