Testing causes damage to Seattle SR 99 tunnel building

A test of the Highway 99 tunnel’s ventilation system caused damage to an operations building Thursday. WSDOT said inspectors found no structural damage. KING 5’s Chris Ingalls reports. More info on Testing causes damage to Seattle SR 99 tunnel building

source https://seattlepalate.com/media/testing-causes-damage-to-seattle-sr-99-tunnel-building/