Port Of Seattle’s memorandum in opposition to ACC’s motion for summary judgment regarding the absence of a water right for third runway § 401 certification

Notes

The Port of Seattle opposes the Airport Communities Coalition’s motion for summary judgment, arguing that no water right is required to manage stormwater as mandated by its NPDES permit and 401 Certification. The Port outlines how its stormwater management plan—including detention ponds, vaults, and infiltration—addresses peak flow, low flow, and water quality impacts from new impervious surfaces created by the Third Runway and Master Plan Update projects. The Port argues that ACC’s position is unsupported by stormwater regulations, the water code, or any other applicable law.