What is going on with East Lake Street in Minneapolis? That’s the question the Longfellow Community Council (LCC) asked me last year when I was tasked with a market study to determine reasons and solutions for a stubbornly high commercial vacancy rate. The answer goes far beyond waiting for retail demand to return and space to absorb. East Lake Street (between Hiawatha Avenue and the Mississippi River) suffers from a variety of systemic maladies, just like any number of aging commercial corridors around the country. The good news is there is a lot of potential, with a corridor vision, attention…