Not sure why they would do that but the cultivar Skyline is hardy to zone 3 and is listed much smaller than the species at 35 to 40 ft. We have trees that get to 100 ft near the roads here, but they were already there, the city didn't plant them. The power company has to get your permission and then they come out and trim them. I don't know why a city would put that work upon themselves or the power companies. Poor planning on their part, here is a link to that cultivar
http://www.missouribotanicalga...
There aren't many trees with that type of leave, the Black Locust is similar but the leaves are rounder on the tips than yours. They get 70'.
