六(liu)工城(cheng)遺址城(cheng)墻(qiang)底(di)(di)寬(kuan)4米(mi),頂(ding)寬(kuan)2.8米(mi),高7.5米(mi),夯土版筑(zhu),夯層厚約(yue)0.16米(mi)。南(nan)﹑西﹑北三面(mian)各有(you)城(cheng)門及甕城(cheng),城(cheng)墻(qiang)呈直線,唯以東(dong)城(cheng)墻(qiang)連(lian)續四次內(nei)折,南(nan)、西、北墻(qiang)保(bao)存相對較(jiao)(jiao)好,外(wai)城(cheng)東(dong)墻(qiang)倒塌嚴重。全城(cheng)共(gong)有(you)內(nei)外(wai)角(jiao)墩(dun)7個、馬面(mian)8個。大城(cheng)東(dong)北連(lian)接一座小城(cheng)障(zhang),平(ping)面(mian)呈方形,南(nan)面(mian)正中(zhong)設門,東(dong)西長76米(mi),南(nan)北寬(kuan)82米(mi),面(mian)積6232平(ping)方米(mi),夯土版筑(zhu),底(di)(di)寬(kuan)8.3米(mi),頂(ding)寬(kuan)4.9米(mi),高10米(mi)。除東(dong)北角(jiao)外(wai)側(ce)剝(bo)落較(jiao)(jiao)為嚴重外(wai),其它(ta)墻(qiang)體保(bao)存完整。
六工城(cheng)遺址(zhi)是(shi)絲(si)綢之路上(shang)兩漢以(yi)來一處重(zhong)要(yao)的城(cheng)址(zhi),初步(bu)考證大城(cheng)當為“宜禾縣”,小城(cheng)當為“昆侖障”之故址(zhi)。始建于漢代,城(cheng)外有農(nong)田水利遺跡(ji),證實當時宜禾城(cheng)既是(shi)軍事要(yao)塞,又(you)是(shi)農(nong)業屯墾區,為研究絲(si)綢之路發展和各民族交往有重(zhong)要(yao)的價值。