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Highway Runoff Manual

Description: The Highway Runoff Manual (HRM) provides guidance to direct the planning and design of stormwater management facilities for existing and new Washington State highways, rest areas, park-and-ride lots, ferry terminals, and highway maintenance facilities throughout the state. The HRM establishes minimum requirements and provides uniform technical guidance.

  • Date Originally Published: May, 2006
  • Publication Number: M 31-16
  • Last Modified: March, 2007
  • Version:
  • Manual Manager: Larry Schaffner
  • Originators: Environmental Services, Engineering and Regional Operations Division
  • # of Pages: 604
  • Subject: Planning and design of stormwater management.
  • Keywords: Highway Runoff Manual, Washington State Department of Transportation Highway Runoff Manual, WSDOT Highway Runoff Manual
  • Related Publications: Hydraulics Manual M 23-03


This abstract was last modified July 15, 2008