Credit Union in Ottumwa, IA (South Branch) The Ottumwa (South) branch, established in 1988, offers a full-range of financial services and is dedicated to helping our members achieve financial success. This location includes drive-thru service, 24-hour Preferred Status ATM availability, and is home to an Interactive Teller Machine (C1st InTouch) - It looks like an ATM, the difference is you can have a real-time, face-to-face conversation with a C1st Teller, make cash withdrawals, deposit cash or checks, cash checks, make certain loan payments, transfer funds and more! This office remains the main office of the credit union.