Sounder South Capacity drop-in session, Sumner Station September 17, 2019 | 3:00 p.m. - 7:00 p.m. Add to calendar Investments are coming to Sounder South: Attend a drop-in session this September. An online open house will be available Sept. 10-24. Visit the project website Sumner Station 810 Maple St. Sumner, WA 98390 Plan your trip Share this