Treestock dividens soar at Steinhart Park Treestock dividends are soaring days after the independence celebration at Steinhart Park. The dividend pay off in this instance amounted to music, community and positive vibes which resounded around and through the day on Saturday, July 3. Treestock involved live music accompanied by a cornhole tournament and food trucks that kept all well fed. Tammy Partsch of the Nebraska City Tourism and Commerce said there had always been a desire to enhance the experience for all those who come to enjoy Jaycee Fireworks Show. “We’ve wanted for a long time to capitalize on the people who come to Nebraska City for the Fourth of July. This all-day concert was born out of that desire,” Partsch said.