KDWB sponsored an Aquatennial Beach Party/Rock Festival at Lake Calhoun on July 19, 1973.  It was organized by Don Cline and Chuck Buell from KD.  Rain kept the crowd to 5,000 – 10,000.  Performing were Tony Joe White, Brownsville Station, and Don Bleu and the Upper Division.  Rain cancelled Marshall Tucker, but they came back the following Tuesday and performed at Minnehaha Falls, as did the band Straight Up.