忠县县城东北4公里处为渝东地区先秦时期遗址最为集中地区之一,从县老城关沿江而下,江边由西南向东北依次有杜家院子、瓦渣地、哨棚嘴、半边街(崖脚)和罗家桥等遗址,是相互间有密切联系又各自独立的遗址群,被称为(洽甘)井沟遗址群。罗家桥遗址为(洽甘)井沟遗址群中的一个,为遗址群最东北的一处。遗址位于(洽甘)井河入长江口东北岸的沿江台地上,地属忠县忠州郑公村管辖。南隔冲沟与周家院子遗址相 4 kilometers northeast of Zhongxian County is one of the most concentrated areas in the pre-Qin period in the eastern part of Chongqing. From the Laochengguan Pass along the river, the waterfront of Dujiangyuan, Wadong, (Cliff foot) and Luojiaqiao and other sites, are closely linked with each other and independent of the site group, known as (Qigan) well ditch ruins group. Luojiaqiao site (Qia Gan) Jinggou ruins group, one of the most northerly ruins group. The site is located in (Gan Gan) well into the Yangtze River estuary northeast coast of the Yangtze River platform, to Zhongxian Chungju Zhenggong village jurisdiction. South separated gully and Zhou courtyard yard phase