2004年10月,配合上武高速公路南段建设,河南省文物考古研究所发现并调查了泌阳下河湾冶铁遗址,发现各类冶铁遗存,其时代从战国中晚期开始,一直延续到东汉时期,是一处大型冶炼与铸造并存的“大铁官”作坊遗址。它的发现对中国冶金史研究具有重要意义。 In October 2004, in coordination with the construction of the southern section of Shangwu Expressway, Henan Provincial Institute of Cultural Relics and Archeology discovered and investigated the Yehewan Ye site in Biyang and discovered all kinds of remains of the iron smelting. Its era has continued since the middle and late Warring States Period To the Eastern Han Dynasty, is a coexistence of large smelting and casting “big iron official ” workshop site. Its discovery is of great significance to the study of the history of metallurgy in China.