Tryon creek bridgeAfter retiring, Carl began volunteer work at environmental non-profit groups in Oregon. He became certified as a Master Watershed Steward and ran a local watershed stewardship organization. He was President of the Tryon Creek Watershed Council, and now leads a group that is seeking to replace a huge culvert/fish-barrier that has blocked anadromous fish from the urban Tryon Creek Basin for more than 80 years.