Installation

Function

Location

Elevations

(from– to)

Age period

Gihon Spring

Sourced from a karstic aquifer

NE Jerusalem

~635 m

Quarter-

nary

Upper Tunnel

(UT)

Subterranean passage to the lower level water installations around the Gihon Spring

Entrance beneath MBII Stepped Wall

~661.91 m till 647.2 m at WS

MBII