Credit Union in Mount Pleasant, IA The Mount Pleasant branch is C1st’s 15th branch location in Iowa and was established on June 14, 2012. The branch offers a full-range of financial services and is dedicated to helping our members achieve financial success. The 2,000 square-foot building includes drive thru service and 24-hour Preferred Status ATM availability. Check out our personal banking pages for any questions related to checking, savings, loans and online banking.