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.

Individual Chapters

Full Manual (pdf 6.32 MB)

• Date Originally Published: May, 2006
• Publication Number: M 31-16
• Last Modified: June, 2008
• Version: M 31-16.01
• Manual Manager: Mark Maurer
• Originators: Design Office, Engineering and Regional Operations Division
• # of Pages: 601
• 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:

  May 2006 Highway Runoff Manual
  Hydraulics Manual M 23-03

Highway Runoff Manual Individual Chapters

Contents (pdf 251 KB)

Chapter 1 Introduction (pdf 217 KB)

Chapter 2 Stormwater Planning and Design Integration (pdf 374 KB)

Chapter 3 Minimum Requirements (pdf 383 KB)

Chapter 4 Hydrologic Analysis (pdf 1.15 MB)

Chapter 5 Stormwater Best Management Practices (pdf 4.8 MB)

Chapter 6 Temporary Erosion and Sediment Control Design Guidelines
                    and Process (pdf 655 KB)

Glossary (pdf 294 KB)

This abstract was last modified September 17, 2009