Final SEIS due Sept. 12 as Sammamish begins detailed town‑center code work; council told implementation will determine whether housing goals are met

City staff and outside consultants told the Sammamish City Council on Sept. 9 that the city will release a final Supplemental Environmental Impact Statement (SEIS) for the town‑center subarea on Sept. 12 and that the next phase of work will be detailed plan and code updates intended to make low‑rise and mid‑rise development feasible where the comprehensive plan directs growth.

Jeff Arango and Matt Campbell of Framework and David Pyle, director of Community Development, explained that the final SEIS will supplement earlier environmental work, incorporate responses to about 800 public comments and clarify transportation mitigation. The consultants said the final SEIS updates the transportation analysis, includes more specific mitigation for a single intersection identified as failing in the analysis and explains how two procedural SEPA tools would be applied: a traditional planned‑action approach and the newer infill exemption for residential and mixed‑use projects.

“The final SEIS is a decision‑support document,” Arango said, and the consultants emphasized that selecting a subarea direction will not itself adopt a development approval but will set…