Floodplain Development Regulations Update - Project Documents

Project Documents

Permanent Floodplain Development

• Notice of Public Hearing
• Ordinance Text
• Supporting Documents

Tenth Extension of Interim Regulations

• Notice of Public Hearing
• Ordinance Text
• Summary and Fiscal Note

August 21, 2025, SEPA Addendum

• SEPA Public Notice
• Director's Report
• Appendix A Instructions for Flood Zone Location and Type by Address
• Appendix B FEMA Flood Zone Designations
• Appendix C FEMA Review Table 

August 1, 2024, SEPA Documents

• SEPA Threshold Determination
• SEPA Checklist
  • Appendix A Historic/Cultural Resources and Earth/Geology Context
  • Appendix B Variance Guidance

July 2021 SEPA Documents

• Director’s Report
• Appendix C of Director’s Report
• July 2021 SEPA Proposed Permanent Floodplain Regulations
• July 2021 SEPA Checklist
• July 2021 SEPA Decision

Interim Floodplain Development Regulations and Extensions

• Ordinance 127384 Interim Regulations Extension #10
• Ordinance 127258 Interim Regulations Extension #9
• Ordinance 127179 Interim Regulations Extension #8
• Ordinance 127064 Interim Regulations Extension #7
• Ordinance 126994 Interim Regulations Extension #6
• Ordinance 126885 Interim Regulations Extension #5
• Ordinance 126763 Interim Regulations Extension #4
• Ordinance 126651 Interim Regulations Extension #3
• Ordinance 126536 Interim Regulations Extension #2
• Ordinance 126271 Interim Regulations Extension #1
• Ordinance 126113 Interim Regulations
• The Flood Insurance Study for King County Washington
• Flood Insurance Rate Maps