TagState of Washington(146)
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2017-12-01King County Greenhouse Gas Emissions Inventory: A 2015 Update
★ 32This December 2017 report inventories greenhouse gas emissions across King County, Washington, providing a comprehensive 2015 update that examines emissions by sector using geographic-based and consumption-based methodologies. It was prepared by Cascadia Consulting Group and Hammerschlag & Co. LLC, covering sources such as transportation, buildings, waste, and energy use. The report tracks changes in emissions over time and analyzes key data sources to help inform county-level climate and environmental policy decisions. -
2026-07-31Mitigation bank service area map
A map showing the mitigation bank service area within WRIA 9 (Water Resource Inventory Area 9), encompassing three subwatersheds: the Lower Green River Subwatershed, the Duwamish Estuary Subwatershed, and the Nearshore Subwatershed. The map displays the Green-Duwamish River and its associated streams in the greater Seattle/King County area of Washington State. An inset map shows -
2026-04-28Washington State Unconstrained Forecast Report
Draft unconstrained air travel demand forecast report prepared by Steer for the Commercial Aviation Work Group (CAWG), presented April 28, 2026 in Moses Lake, Washington. Covers Washington State’s 17 busiest commercial airports including SEA (Seattle-Tacoma International, 26.317M enplanements), GEG (Spokane International, 2.114M), PSC (Tri-Cities, 0.528M), PAE (Seattle Paine Field, 0.306M), BLI (Bellingham International, 0.226M), PUW -
2026-04-28Advanced air mobility (aam) in washington: a statewide vision
WSDOT Aviation Division presentation outlining Advanced Air Mobility concepts in Washington State. Covers alternative energy sources, operation types, aircraft configurations, and size categories for AAM vehicles. -
2026-04-28Washington State Unconstrained Forecast: Draft Presentation
This draft report, prepared by the Commercial Aviation Work Group and consulting firm Steer, presents an unconstrained air travel demand forecast for Washington State's 17 busiest commercial airports, with Seattle-Tacoma International (SEA) accounting for the vast majority of the state's approximately 29.8 million enplaned passengers in 2025. The forecast combines a short-term bottom-up model based on airline schedules with a long-term top-down model driven by macroeconomic factors such as GDP, population, and airfares, ultimately producing airport-level traffic projections. While focused on statewide aviation demand planning, the findings have direct relevance to Sea-Tac noise policy discussions given SEA's dominant share of regional air traffic. -
2026-04-28
Washington State Unconstrained Forecast: Draft Presentation
Draft unconstrained air travel demand forecast presentation prepared by Steer for the Commercial Aviation Work Group (CAWG), presented April 28, 2026 in Moses Lake, Washington. Covers 17 Washington State commercial airports including SEA (Seattle-Tacoma International, 26.317M enplanements), GEG (Spokane International, 2.114M), PSC (Tri-Cities, 0.528M), PAE (Seattle Paine Field, 0.306M), BLI (Bellingham International, 0.226M), and smaller -
2026-04-28
Washington State Unconstrained Forecast Report
A draft working document prepared by the Commercial Aviation Work Group presents an unconstrained air travel demand forecast for Washington State's 17 busiest commercial airports, with Seattle-Tacoma International Airport (SEA) leading at approximately 26.3 million enplanements in 2025 out of a statewide total of nearly 29.8 million. The report, dated April 28, 2026, covers market analysis and air traffic forecasts across airports ranging from large hubs like Sea-Tac and Spokane International to smaller facilities such as Renton Municipal and Roche Harbor. The forecast is described as 'unconstrained,' meaning it projects potential demand without accounting for limitations in airport capacity or infrastructure. -
2026-03-18FAA Compliance Correspondence: WSDOT Aviation Fuel Tax Federal Revenue Use Requirements — Missed 2/18/26 Deadline
Email chain forwarded by Ann Richart (WSDOT Aviation Director) to Ryan Zulauf (FAA) on March 18, 2026, documenting escalating FAA compliance dispute over Washington State aviation fuel taxes and federal revenue use requirements. Steven Breaux (WSDOT Director of Legislative Relations) provides a timeline of correspondence from April 10, 2024 through March 17, 2026, including FAA -
2026-03-18
FAA Compliance Correspondence: WSDOT Aviation Fuel Tax Federal Revenue Use Requirements — Missed 2/18/26 Deadline
P020444-042926 Installment #2 WSDOT/FAA Email chain forwarded by Ann Richart (WSDOT Aviation Director) to Ryan Zulauf (FAA) on March 18, 2026, documenting escalating FAA compliance dispute over Washington State aviation fuel taxes and federal revenue use requirements. Steven Breaux (WSDOT Director of Legislative Relations) provides a timeline of correspondence from April 10, 2024 through March -
2026-03-17P020444-042926 – FAA Review of Washington State Aviation Fuel Tax Compliance: Email Correspondence
Email correspondence between FAA, Washington State Department of Revenue (Acting Director John Ryser), WSDOT (Julie Meredith, Ann Richart), and Office of Financial Management (Katherine Chapman-See) regarding FAA Review of Washington State Aviation Fuel Taxes and Compliance with Federal Revenue Use Requirements. Includes auto-reply from FAA’s Ryan Zulauf (November 6, 2025) and March 17, 2026 notification