Tri-Cities regional climate element presented to Richland Planning Commission; consultants outline HB 1181 requirements and local findings

Mike Stevens, Richland’s planning manager, introduced a presentation by Cascadia Consulting Group on the Tri-Cities regional climate element, the chapter required by the state Growth Management Act following enactment of House Bill 1181.

“...this will be kind of the first step, if you will, into our 2026 comprehensive plan periodic update,” Stevens said, describing the climate element as one of several plan elements that must integrate climate resilience and greenhouse-gas mitigation.

Representatives from Cascadia — Gretchen Mueller and Kathryn Allison — described the regional collaboration among Benton County, Richland, Kennewick, Pasco and West Richland and explained why jurisdictions elected a joint approach: climate impacts traverse municipal borders, and a coordinated effort lets the jurisdictions pool technical resources through the Ben Franklin Council of Governments. Mueller said the regional element is being drafted to comply with Department of Commerce guidance and House Bill 1181.

Cascadia outlined the two required subelements: a climate-resilience subelement addressing hazards, vulnerabilities and adaptation measures; and a greenhouse-gas (GHG) emissions-reduction subelement that includes emissions inventories and mitigation strategies. The consultants said the GHG subelement must support targets that reach net-zero emissions by 2050 on both total and per-capita bases and must address priority sectors including transportation, buildings energy, and land use/zoning.

Key findings presented for Richland included survey and vulnerability-assessment results: residents report impacts from extreme weather, and the top hazards in the Tri-Cities region are wildfire and smoke, extreme heat, drought and extreme precipitation. Cascadia cited Richland-specific vulnerabilities including development pressure into wildfire-risk areas, agricultural lands exposed to extreme heat, and archaeological resources near the Yakima River confluence that could be affected by flooding or habitat degradation.

Cascadia summarized the city’s greenhouse-gas profile: on-road passenger vehicles and industrial natural gas were the largest emission sources cited in the draft inventory. The consultants also reported vehicle-miles-traveled modeling that found minimal projected VMT growth for Richland and a higher share of short commute trips: roughly 75% of commute trips in the city are under 25 minutes, above the regional average.

Commissioners asked technical and implementation questions. A commissioner raised the tradeoffs between tree-canopy expansion and water use; Kathyrn Allison (Cascadia) said the tree-canopy assessment will be an appendix and the draft policies encourage prioritizing native and drought-tolerant species to balance cooling benefits with water demand. Commissioners and staff also discussed water-supply constraints and the role of irrigation districts; Cascadia and staff agreed to follow up about outreach to irrigation and water providers.

Cascadia described the public-engagement timeline: initial public meetings and a survey were held earlier in the year; a three-week public review and comment period for the draft climate element will open in September with virtual and in-person sessions (Cascadia said one virtual meeting and one in-person meeting will be scheduled regionally). The consultants said a final regional draft is expected by Oct. 31; individual jurisdictions will then integrate and customize the regional element for local comprehensive-plan adoption between November 2025 and December 2026.

Nicole Stickney of AHBL, the firm contracted to lead Richland’s broader comprehensive-plan update, described how the regional climate element will be handed off to the local comprehensive-plan process and noted the need to coordinate engagement and avoid survey fatigue. Stevens advised commissioners to watch for the Sept. 24–Oct. comment timeline and to attend a virtual public meeting on Sept. 29. The Planning Commission did not take policy action at the meeting; the presentation was informational and intended to solicit commission feedback ahead of the public-comment period.