The Brierfield charcoal blast furnaces, financed by the Confederate government, produced exceptionally good foundry iron suitable for casting into rifled cannons including the South's most important naval artillery piece: the Brooke cannon. Brierfield's brick-walled blast furnace built during Reconstruction produced the first commercial scale runs of coke pig iron in the state. This furnace, the base of which remains, marks the transition between charcoal-fired stone furnaces and modern steel-jacketed coke furnaces. Remaining foundations of Brierfield's Confederate-financed rolling mill are considered the most intact remnants of a wrought iron rolling mill in the state. The railroad linking furnace to mill also remains.