Bolivar Post Office as it exists today. Located at the intersection of 4th and Market Street the Post office is a social place for the citizens to gather six days a week to collect their mail. Although the Post Office is only open from 9 AM until Noon you can rest assure the mail still gets out to everyone. Prior to being a Post Office this building housed Gamble and Gamble Construction Offices. J. Conrad Gamble leases the building to the Postal Authority The building also has apartments above the Post Office.