 A Johnson Creek near Hoyt Arboretum on the west side of the Willamette River in Portland has no relationship to the Johnson Creek on the east side.The Johnson Creek Watershed Council (JCWC) is a nonprofit group organized in 1995 to protect the creek and its watershed.Its projects involve such things as controlling invasive species, planting native riparian vegetation, improving fish passage, and creating off-channel flood storage.