永(yong)惠(hui)(hui)橋(qiao)(qiao)(qiao)(qiao)位于山(shan)西(xi)省長(chang)治(zhi)市襄垣(yuan)(yuan)縣(xian)城北(bei)(bei)門(men)(men)與北(bei)(bei)廓門(men)(men)之間甘水河兩岸,永(yong)惠(hui)(hui)橋(qiao)(qiao)(qiao)(qiao)俗稱北(bei)(bei)關橋(qiao)(qiao)(qiao)(qiao)。永(yong)惠(hui)(hui)橋(qiao)(qiao)(qiao)(qiao)是一座(zuo)(zuo)單孔青石結構的(de)拱形(xing)橋(qiao)(qiao)(qiao)(qiao),橋(qiao)(qiao)(qiao)(qiao)南北(bei)(bei)長(chang)33.6米(mi),東(dong)西(xi)寬8.34米(mi)。橫(heng)跨于襄垣(yuan)(yuan)縣(xian)城北(bei)(bei)門(men)(men)外的(de)甘水河上。永(yong)惠(hui)(hui)橋(qiao)(qiao)(qiao)(qiao)采(cai)用縱聯(lian)式砌筑(zhu)法拱劵技(ji)(ji)術(shu),拱劵石以疊(die)澀收(shou)分(fen)法壘砌,形(xing)成下大上小的(de)立體式梯(ti)形(xing)結構的(de)橋(qiao)(qiao)(qiao)(qiao)座(zuo)(zuo),體現(xian)了(le)我國古代拱形(xing)技(ji)(ji)術(shu)的(de)科技(ji)(ji)水平。
永(yong)惠橋(qiao)(qiao)為單孔實腹尖拱(gong)石(shi)(shi)(shi)橋(qiao)(qiao),長29.5米,寬(kuan)8.5米,橋(qiao)(qiao)孔凈跨(kua)12.8米,矢高7.5米,高跨(kua)之比(bi)約為1:0.59。整個(ge)建(jian)筑用(yong)(yong)長方形(xing)(xing)、梯形(xing)(xing)、微弧形(xing)(xing)石(shi)(shi)(shi)灰(hui)巖條石(shi)(shi)(shi)橫置砌成,拱(gong)券(quan)兩側正(zheng)中龍門(men)石(shi)(shi)(shi)上采用(yong)(yong)深、淺浮(fu)雕手法各雕"四爪升龍"三條。橋(qiao)(qiao)面(mian)兩側有望柱(zhu)、欄桿、石(shi)(shi)(shi)欄板(ban)裝飾。欄板(ban)雕刻(ke)春秋花卉、人物故事等,背面(mian)刻(ke)花紋(wen)。
據清(qing)乾隆縣志載(zai):永惠橋(qiao)始建(jian)于金(jin)天會九(jiu)年(nian)(1131年(nian))。歷經明成化(hua)年(nian)間,明萬歷十(shi)(shi)九(jiu)年(nian)(1591年(nian))、清(qing)道光(guang)十(shi)(shi)九(jiu)年(nian)(1838年(nian))多(duo)次(ci)維(wei)修。現存永惠橋(qiao)及(ji)附屬文(wen)物(wu)五龍廟山門(men)、正(zheng)殿、樂(le)樓。是中華人民共和國全(quan)國重點文(wen)物(wu)保(bao)護單位之一。
1996年1月(yue)12日,授予山西省(sheng)文物保護單(dan)位,2013年5月(yue)授予全國重點(dian)文物保護單(dan)位,是一座古(gu)建筑(zhu)及歷史紀念建筑(zhu)物。