New Hampshire Furnace was built 6 miles west in 1846 on a tract of 30,000 acres by Samuel Seaton and others. Its stone stack was 35 feet high and 10 feet across inside, with charcoal fuel and a steam-powered air blast. In 22 weeks of 1854, it produced 970 tons of iron, hauled in pigs by oxcarts to the Ohio River, and it was probably not operated after 1854. Kentucky had been a major iron producer since 1781, ranked 3rd in the U.S. in the 1830s, and 11th in 1965. Charcoal timber, native ore, and limestone supplied numerous furnaces that made pig iron, utensils, and munitions in the Hanging Rock, Red River, Between Rivers, Rolling Fork, and Green River regions. The old charcoal furnace era ended because ore and timber were depleted and railroads grew.