Washington state highway runoff manual

Highway Runoff Manual (HRM) 2014 Highway Runoff Manual The Highway Runoff Manual (HRM) is an integral part of the WSDOT NPDES municipal stormwater permit (Permit). 2018 update to the Stormwater Management Manual for Eastern Washington. Ecology is supporting and leading the effort to update the 2004 Stormwater Management Manual for Eastern Washington, as it has been over 10 years since the manual was written. The Washington State Department of Transportation Highway Runoff Manual, as determined by the Washington State Department of Ecology to be equivalent to the 2014 Department of Ecology Stormwater Management Manual for Western Washington, may be used to meet the requirements of chapters 30.

63A and 30. 63B SCC for public road Washington State Department of Transportations Highway Runoff Manual (for WSDOTrelated road projects) or the most current edition of the Washington Department of Ecology's Stormwater Management manual for Western Washington (provided that any more restrictive City Washington State Department of Transportation 2016 Highway Runoff Manual Washington State Hydrologic Model WWHM2012 version Clark County Public Works Standard Details Reference Manual Highway Runoff Manual M 3116.

03 Page 4i November 2011 Chapter 4 Hydrologic Analysis Highway Runoff Manual M 3116. 03 Page 4iii November 2011 List of Tables.

requirements apply to Washington State Department of 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, parkandride lots, ferry terminals, and highway maintenance facilities throughout the WSDOT Highway Runoff Manual.

We completed our review of the Nov. 2011 Washington State Department of Transportation Highway Runoff Manual and found that it meets minimum design requirements and best management practices for public road projects equivalent to Ecology's 2014 SWMMWW and 2004 Stormwater Management Manual (25)" WSDA" means the Washington state department of agriculture.

(26)" WSDOT" means the Washington state department of transportation. highway runoff manual to direct stormwater management for its existing and new facilities and rights of way in the Puget Sound basin. (2) Amendments to manual.

The Washington State Department of Transportation completed a major revision and update of its Highway Runoff Manual (HRM), first published in 1995. The need for the revision was triggered by several factors, including incorporating recent advances in the science of stormwater management, adding new best management practices (BMPs), 2018 Stormwater Management Manual for Eastern Washington Chapter 1 Page 1 Chapter 1 Introduction 1.

1 Purpose and Scope The objective of the Stormwater Management Manual for Eastern Washington (manual) is to provide guidance in stormwater design and management for eastern Washington.

The highway runoff manual shall be consistent with ecology's stormwater management manual and shall be adopted by WSDOT only after obtaining ecology's approval. After obtaining ecology's approval, WSDOT shall use the highway runoff manual to direct stormwater management for its existing and new facilities and rights of way in the



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