When and What:  From 1915 up to about 1930? ... These pictures span a few years. The first is Excelsior I think around 1920 and while they have a nice concrete sidewalk, the road looks like packed dirt but maybe could be bituminus treated.  (Thick liquid oil from an oil tank truck with gravel spread over it and packed down by traffic... not the same as bituminus paved roads as most people know them today.) The next picture is an express steam boat  on the lake obviously. The third one is of a recent local engineering feat, the "Narrows" bridge, which crosses the channel of the same name connecting the upper and lower lake systems of Minnetonka. The last picture is of the once famous Excelsior Amusement Park during it's golden age... 1920's.