2020 Stormwater Report

2020

STORMWATER REPORT

NPDES Municipal Stormwater Permit Annual Report for Fiscal Year 2020

Title VI, ADA

Title VI Notice to Public It is the Washington State Department of Transportation's (WSDOT) policy to assure that no person shall, on the grounds of race, color, national origin or sex, as provided by Title VI of the Civil Rights Act of 1964, be excluded from participation in, be denied the benefits of, or be otherwise discriminated against under any of its federally funded programs and activities. Any person who believes his/her Title VI protection has been violated, may file a complaint with WSDOT's Office of Equal Opportunity (OEO). For additional information regarding Title VI complaint procedures and/or information regarding our non-discrimination obligations, please contact OEO's Title VI Coordinator at (360) 705-7082.

Americans with Disabilities Act (ADA) Information This material can be made available in an alternate format by emailing the WSDOT Diversity/ADA Affairs team at wsdotada@wsdot. or by calling toll free, 855-362-4ADA (4232). Persons who are deaf or hard of hearing may make a request by calling the Washington Relay at 711.

WSDOT 2020 Stormwater Report ? i

Table of Contents

Contents

Title VI, ADA i Table of Contents ii List of Figures iv List of Tables v List of Acronyms vi Certification vii Chapter 1 - Stormwater Program Management1

Stormwater Management1 Water Quality Regulations1 Areas Covered by the Permit 1 How to Use This Report3 Permit Implementation Costs3 Triggered Reporting Items 4 Chapter 2 - Total Maximum Daily Loads 6 Total Maximum Daily Loads in the Permit6 Implementing TMDL Requirements 6 Chapter 3 - Construction Site Stormwater Pollution Prevention 10 Temporary Erosion and Sediment Control10 Fall Assessments 10

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Table of Contents

Chapter 4 - Stormwater Infrastructure 13 Planning and Designing New Facilities 13 Retrofits14 Stormwater System Mapping 16 Illicit Discharge Detection and Elimination 17

Chapter 5 - Maintenance and Operations19 Road and Facility Maintenance and Operations 19 Treatment and Flow Control BMP Maintenance 19 Catch Basin Maintenance 20 Ferry Terminal Maintenance and Operations20

Chapter 6 - Stormwater Monitoring23 Stormwater Monitoring and Effectiveness Studies 23

Chapter 7 - Education and Public Involvement26 Education and Public Involvement26 Internet Site27 Knowledge and Technology Transfer27

Appendix 129 Appendix 240 Appendix 342

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