kashkan birdge is located on a river by the same name of shapoorkast tarhan in historical texts, is has been mentioned as kazhki . it is about 320 meters mide. it,s uppermost patrt is 26 mwters high and it,s lowest part 10 meters high . there of its 12 arches have been destroyed , and the others remained intact . its piles are made of big. carved stones . it is made of gypsum, stone , and brick . next to this bridge , there are remains of three other briges of the pas eras, which are coparable wiht that of the sassanids. the present bridge dtes back to the 4th century A.H , and it is registered as number 355 in the list of iranin uational monuments