MOUNT UNION — The city council in Mount Union voted to dissolve the tiny southeast Iowa city, giving residents 30 days to seek a special election or watch as the community officially disappears. The council acted Tuesday night to proceed with disincorporation. Unless enough residents sign a petition calling for a special election, the state will work with Henry County to eliminate Mount Union’s debts and sell its assets. The 100-person city is about 20 miles northwest of Burlington.