on 7 february 1955 she reclassified to mma-13, and on 1 may she was named "miantonomah". the newly renamed ship reported to the long beach group, pacific reserve fleet, to begin inactivation on 14 may. "miantonomah" decommissioned at terminal island, long beach, california, 19 july 1955. she entered the pacific reserve fleet at long beach. her name was struck from the navy list 1 july 1960 and she was sold to hubert p. sturdivant and edward madruga of san diego, 17 february 1961. she was delivered to her purchaser on 28 february.