In 2004, a $7.85MM addition to the famous Ralph Engelstad Arena was built. This addition was named the Betty Engelstad Sioux Center to honor the wife of the late Ralph Engelstad. The University of North Dakota wanted a centralized athletics facility that accommodates more than one sport. There was also a desire to utilize the infrastructure created by the original Ralph Engelstad Arena.
The arena is home to the University of North Dakota men's and women's basketball teams and the women's volleyball team but is also a great venue for catered events, and smaller concerts or shows. The project included a full-sized basketball and volleyball court with the bleachers capable of retracting to create space for four regulation-sized basketball courts or five regulation-sized volleyball courts for practices or camps.
The arena has a seating capacity of 3,300. The facility features power-operated, self-storing divider curtains and power-operated, self-storing seating sections to allow for quick conversation. The architecture of the building was designed to be complementary to the original Ralph Engelstad Arena but was accomplished within a much tighter budget. The building's design and construction were completed within 13 months.