The 77th Street Depot Federal Credit Union was founded in 1938, The original field of membership was and is Chicago Transit Authority employees and their family members. The Credit Unions were founded on the idea that though a cooperative financial effort, individuals sharing common bonds could benefit. The 77th Street Depot Federal Credit Union is a not – for- profit financial cooperative owned by its members. Credit Unions were founded on the idea that though a cooperative financial effort, individuals sharing common bonds could benefit.