The Outdoor Aquatic Center, located on the west end of Eppley Recreation Center, is a vibrant and fun space for aquatic activities under the sun. From lap swimming to sand volleyball, or simply relaxing on the pool deck the OAC is a great place to be active during warm months. The Outdoor Aquatic Center, located on the west end of Eppley Recreation Center, is a vibrant and fun space for aquatic activities under the sun. From lap swimming to sand volleyball, or simply relaxing on the pool deck the OAC is a great place to be active during warm months.