Calendar of Events Iowa Opera Orquesta Alto Maiz at Chariton 3/26/2010 - Iowa Opera Orquesta Alto Maiz at Carpenter Hall at 7 p.m. Tickets can be purchased at the door for adults $10 and 18 & under $5. There will be a cash bar, and appetizers and snack items will be for sale during the concert. For more information, call the Chamber at 774-4059.