Pastor Koch founded Ebenezer German Congregational Church in Portland, Oregon, in 1892. Prior to serving the Ebenezer Church, he was pastor of First Congregational Church in Ritzville, Washington (1882-1891), and the Evangelical Lutheran Congregational Church in Endicott, Washington (1883-1893). After serving at Ebenezer, he again led the First Congregational Church in Ritzville (1893-1895) as well as the Zion German Congregational Church in the same town (1893-1894). After Zion, he returned to Ebenezer and also served the church in Stafford, Oregon (1895-1899) before going on to the Salem Church in Ralston, Washington (1899-1904).
- Volga Germans in Portland (Steve Schreiber)