The discovery of a tiny endangered bat could delay work on a $31 million interstate interchange expected to spur development and bring new businesses and jobs to Waukee and West Des Moines, The Des Moines Register reported. City officials learned in late February that a single female Indiana bat was located about five-eighths of a mile from the site of the proposed Interstate Highway 80 interchange with Alice's Road in Waukee and 105th Street in West Des Moines.