📝 The Concrete Ship: Desperation, Innovation, and the Accidental Permanence of Wartime Engineering
Published Wednesday, June 17, 2026 at 05:57 PM PT The Concrete Ship: Desperation, Innovation, and the Accidental Permanence of Wartime Engineering Introduction: When You Run Out of Steel, You Pour Concrete The USS Limestone (IX-158) wasn’t supposed to exist. More accurately, it wasn’t supposed to be a ship. It was a Trefoil-class concrete barge, an unclassified miscellaneous vessel that the Navy named after a sedimentary rock—calcium carbonate, the kind of thing you find in sidewalks and fertilizer. Laid down on January 5, 1944, at the Belair Shipyard in San Francisco, it represented something that should have been impossible: a warship made of concrete. ...