六工城(cheng)(cheng)遺址城(cheng)(cheng)墻(qiang)底寬(kuan)(kuan)4米,頂(ding)寬(kuan)(kuan)2.8米,高7.5米,夯土版筑(zhu),夯層(ceng)厚約0.16米。南﹑西﹑北(bei)(bei)三面(mian)各有城(cheng)(cheng)門(men)及甕(weng)城(cheng)(cheng),城(cheng)(cheng)墻(qiang)呈直線(xian),唯以東(dong)城(cheng)(cheng)墻(qiang)連(lian)續(xu)四次(ci)內折,南、西、北(bei)(bei)墻(qiang)保存相對(dui)較(jiao)好,外城(cheng)(cheng)東(dong)墻(qiang)倒(dao)塌嚴(yan)重。全城(cheng)(cheng)共有內外角墩7個、馬面(mian)8個。大城(cheng)(cheng)東(dong)北(bei)(bei)連(lian)接一座小城(cheng)(cheng)障,平(ping)面(mian)呈方(fang)形,南面(mian)正中設門(men),東(dong)西長76米,南北(bei)(bei)寬(kuan)(kuan)82米,面(mian)積(ji)6232平(ping)方(fang)米,夯土版筑(zhu),底寬(kuan)(kuan)8.3米,頂(ding)寬(kuan)(kuan)4.9米,高10米。除東(dong)北(bei)(bei)角外側剝落(luo)較(jiao)為嚴(yan)重外,其它墻(qiang)體保存完整。
六工城(cheng)遺(yi)址是絲綢(chou)之(zhi)(zhi)路上兩漢以來(lai)一處(chu)重要(yao)的(de)城(cheng)址,初步考(kao)證(zheng)(zheng)大(da)城(cheng)當為(wei)“宜禾縣”,小城(cheng)當為(wei)“昆侖障”之(zhi)(zhi)故址。始(shi)建于漢代,城(cheng)外有農(nong)田水利遺(yi)跡,證(zheng)(zheng)實當時宜禾城(cheng)既是軍事要(yao)塞,又是農(nong)業屯(tun)墾區(qu),為(wei)研究絲綢(chou)之(zhi)(zhi)路發(fa)展(zhan)和(he)各(ge)民族交往(wang)有重要(yao)的(de)價(jia)值。