 Elizabeth Furnace was a blast furnace in the Shenandoah Valley that created pig iron from 1836 – 1888, using Passage Creek for water power.Iron ore was mined in the mountains, purified in the furnace, then pig iron was transported over Massanutten Mountain to the South Fork of the Shenandoah River, where it was transported for forging in Harpers Ferry, Virginia (later West Virginia.