More than a century ago, Chattanooga city planners intended MLK Boulevard (at the time, it was named Ninth St.) to extend all the way to the Tennessee River. For some reason, construction never made it quite that far. Now it's finally happening. City officials on Thursday broke ground on a new extension that will take MLK through the Blue Goose Hollow area. The project is estimated to cost $3.5 million, and road construction could be completed by early 2020.