20210304 08065400 1.0 TRUE Airport Noise Impact Overlay Zone The Portland International Airport Noise Impact Overlay Zone reduces the impact of aircraft noise on development within the noise impact area surrounding the Portland International Airport. The zone achieves this by limiting residential densities and by requiring noise insulation, noise disclosure statements, and noise easements. https://www.portlandoregon.gov/bps/article/53357 -- Additional Information: Category: Zoning Code Purpose: Map were Airport Noise Impact Overlay Zone applies. Is mapped as (x) overlay on zoning maps. Update Frequency: As Needed -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=53447 Bureau of Planning and Sustainability