Got a reply email today from the Supercharger team saying that they "are hoping to open this station sometime in July". I'm driving back to Ottawa from Nevada City, CA in July and was hoping for the gap on I-70 to be filled between ST Louis and Kansas City by then. I should point out that they did not specifically say it would be in Columbia, so it might be elsewhere along the route. Anyway, great to be able to complete the I-70 run rather than going up and around! And fun to be posting my first forum post.