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Committee moves forward code updates to classify Sound Transit operations yard and tracks; members press for noise protections

5899562 · October 7, 2025
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Summary

Staff proposed two code amendments to accommodate Sound Transit's O&M yard and new light-rail track: reclassify public transportation facilities in the CE zone so industrial-use noise and vibration notes apply, and create a specific land-use category for light-rail infrastructure that removes ordinary height and setback constraints for track alignment.

City staff introduced two related code amendments to address Sound Transit's planned operation-and-maintenance (O&M) facility and the alignment of new light-rail track across properties: one reclassifies public transportation facilities in the Commercial Enterprise (CE) zone so industrial-use notes (noise, vibration and emission limits) apply to the O&M yard; the other creates a specific land-use category and development rules for light-rail infrastructure so track construction on private property is treated as a permitted public-transportation use rather than being constrained by standard setback and height limits for other buildings.

Staff said the 0&M facility includes large maintenance buildings, internal tracks and train storage areas and behaves more like an industrial operation than a public transit station. The proposed CE reclassification moves public transportation facilities into the list of industrial uses so notes about unmitigated releases (toxins, fumes, dust, odors) and prohibitions on unmitigated, perceptible noise or vibration at property lines will clearly apply. Staff and the planning commission said Sound Transit has been consulted and indicated the language is acceptable.

The light-rail track amendment creates a new —light rail infrastructure— land use with no maximum building height and no required property setbacks so track geometry, which must accommodate train grades and alignments, will not be made impossible by ordinary zoning setbacks. The committee discussed community concerns about noise, vibration and visuals from the O&M facility and tracks. Council members asked what recourse residents would have if noise or vibration is worse than predicted; staff reminded the committee that the project is an essential public facility under state law and that many noise questions were covered by the environmental review, but added that the city can enforce local noise and nuisance ordinances and pursue mitigation through the development agreement negotiation with Sound Transit.

Committee members asked staff to ensure noise protections and clear complaint-and-enforcement paths are included in the development agreement and requested that staff continue coordinating with Sound Transit on noise attenuation, public art and other mitigation measures. The committee voted to forward both code amendments to the City Council first reading.