Floodplain Development Regulations Update - Project Documents

Project Documents

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 

Proposed Floodplain Development Regulations and Exhibits

• Proposed Permanent Floodplain Development Regulations

August 1, 2024, SEPA Documents

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

Proposed Floodplain Development Regulations and Exhibits

• Proposed Permanent Floodplain Development Regulations
• Exhibit 1 The Flood Insurance Study for King County Washington
• Exhibit 2 Floodplain and Flood-prone Area Maps
• Exhibit 3 – Ordinance 126113
• Exhibit 4 – Ordinance 126271
• Exhibit 5 – Ordinance 126536
• Exhibit 6 – Ordinance 126651
• Exhibit 7 – Ordinance 126763
• Exhibit 8 – Ordinance 126885
• Exhibit 9 – Ordinance 126994
• Exhibit 10 – Ordinance 127064
• Exhibit 11 – Ordinance 127179
• Exhibit 12 – Ordinance 127258 

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

Proposed Floodplain Development Regulations and Exhibits

• 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