Hydraulic Unknown Limestone (Polygonal Masonry) Good, long stretches preserved ... Ca. 500 B.C.
Commercial Unknown Conglomerate, Limestone Fair, foundations and east stylobate with column drums ... Mid 2nd B.C.
Junction of the Middle Stoa drain and the West Branch of the Great Drain. Note lead pipe in center right ... AMS south 488 Horizontal (normal) ... 29 Mar 1953
