Rivers in Illinois, Kentucky, Washington, and Wyoming, Utah, and Colorado.
LSMR-506 was laid down 31 March 1945 by Brown Shipbuilding Co., Inc., Houston, Tex.; launched 28 April 1945; and commissioned 19 June 1945, Lt. Howard E. Moore in command.
After shakedown off the East Coast, LSMR-506 departed Portsmouth, Va. 7 August, enroute to San Diego, arriving there on the 29th. While enroute, World War II ended. LSMR-506 was assigned to Squadron 3, operating along the West Coast from San Diego. Departing 18 March 1946, LSMR-506 arrived Astoria, Oreg., 4 days later. She decommissioned 20 May 1946 and entered the Pacific Reserve Fleet. While berthed with the Columbia River Group, she was named Green River 1 October 1955. Her name was struck from the Navy List 1 October 1958 and she was sold.