David Rupert, spokesman for the U.S. Postal Service's Colorado operations, tells theGrand Junction Daily Sentinel the service planned to close the post offices by May 15. But because Congress hasn't acted on a request to make changes to the service, including ending Saturday delivery, the closures have been postponed indefinitely.

The Postal Service says it needs to begin closing low-revenue post offices and mail processing centers this year in an effort to become profitable.

Rupert says it's unclear when federal lawmakers will allow the changes. He adds that dozens of amendments already are attached to the measure, some of which have nothing to do with mail delivery.