Home/American Shipper/NWSA container throughput slips after Lunar New Year American ShipperShippingTrade and Compliance NWSA container throughput slips after Lunar New Year FreightWaves Staff · Tuesday, April 17, 2018 Facebook Twitter/X LinkedInTerminals operated by the Northwest Seaport Alliance handled 302,516 TEUs in March, a 9.6 percent decrease from March 2017. N/A