ace ▁provided ▁iron ▁to ▁the ▁Union ▁n avy ▁yard ▁at ▁M ound ▁City , ▁this ▁could ▁have ▁only ▁been ▁possible ▁through ▁stock p iled ▁iron . ▁The ▁furn ace ▁closed ▁perman ently ▁in ▁ 1 8 8 3 , ▁mark ing ▁the ▁end ▁of ▁Illinois ' ▁iron ▁industry . ▁ ▁The ▁furn ace ▁was ▁heavily ▁dam aged ▁by ▁highway ▁construction ▁in ▁the ▁ 1 9 3 0 s . ▁The ▁U . S . ▁Forest ▁Service ' s ▁Gol conda ▁Job ▁Corps ▁Center ▁re built ▁the ▁furn ace ▁in ▁ 1 9 6 7 ▁in ▁order ▁to ▁preserve ▁the ▁structure . ▁The ▁reconst ruction ▁effort ▁also ▁converted ▁the ▁surrounding ▁area ▁into ▁a ▁pic nic ▁site ▁and ▁established ▁a ▁visitor ▁information ▁center ▁narr ating ▁the ▁history ▁of ▁the ▁furn ace ▁and ▁Illinois ' ▁iron ▁industry . ▁The ▁furn ace ▁was ▁added ▁to ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁ 1 9 7 3 . ▁It ▁is ▁the ▁only ▁surv iving ▁iron ▁furn ace ▁from ▁the ▁area ' s ▁iron ▁industry , ▁which ▁was ▁the ▁only ▁completely ▁native ▁iron ▁industry ▁in ▁the ▁state . ▁ ▁References ▁ ▁External ▁links ▁Illinois ▁Iron ▁F urn ace ▁Historic ▁Site ▁ ▁Category : Ind ust rial ▁buildings ▁and ▁structures ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁Illinois ▁Category : Build ings ▁and ▁structures ▁in ▁Hard in ▁County , ▁Illinois ▁Category : B last ▁furn aces ▁in ▁the ▁United ▁States ▁Category : Sh aw ne e ▁National ▁Forest ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Hard in