increase font size Waterville returning to its roots as credit union, students plant elm trees New Dimensions Federal Credit Union planted an elm tree in 2020 and is encouraging others to do the same. Share WATERVILLE — In the 1930s, Silver Street was lined with elm trees, earning the city the nickname Elm City. The newly planted elm tree at New Dimensions Federal Credit Union in Waterville. Photo courtesy of New Dimensions Federal Credit Union In the 1960s and ’70s, construction to develop Waterville began and destroyed more of the famed trees. The ultimate destruction of the trees came from Dutch Elm disease spreading.