Hezekiah’s Tunnel Reexamined

The dates assigned the Siloam Inscription and Jerusalem tunnels are questioned

**Click here to visit the Hezekiah’s Tunnel scholar’s study page.**

A young boy wades through Hezekiah’s Tunnel, the most famous of the Jerusalem tunnels. The image brings to mind the discovery of the Siloam Inscription—located at the southern end of Hezekiah’s Tunnel—by a youth in 1880. Photo: Hershel Shanks.

Hezekiah’s Tunnel, part of Jerusalem’s water system, is located under the City of David. It connects the Gihon Spring—Jerusalem’s fresh water supply—with the Siloam Pool. According to 2 Chronicles 32:2–4 and 2 Kings 20:20, this tunnel was dug during the reign of King Hezekiah of Judah to prepare Jerusalem for the imminent attack of the Assyrian king, Sennacherib. In the Bible, Hezekiah redirected the water through old and newly dug Jerusalem tunnels. However, many have wondered if Hezekiah’s Tunnel was actually dug by Hezekiah at the end of the eighth century B.C.E. (Iron Age II). In the September/October 2013 issue of BAR, editor Hershel Shanks reviews the evidence for the dating of the Jerusalem tunnels in “Will King Hezekiah Be Dislodged from His Tunnel?

The first argument for re-dating the tunnel concerns the Siloam Inscription. Found at the southern end of Hezekiah’s Tunnel, the Siloam Inscription recounts how the men digging the tunnel worked in two directions—one from the north, the other from the south—and met in the middle. The Siloam Inscription does not name Hezekiah or Sennacherib I, the Sennacherib in the Bible, which would simplify matters. While most scholars attribute the Siloam Inscription to the Iron Age II, John Rogerson and Philip Davies argue that it is actually Hasmonean, which raises the question: Which period is a better fit for the Siloam Inscription?

Jerusalem lies at the heart of Biblical archaeology. In the free eBook Jerusalem Archaeology: Exposing the Biblical City, learn about the latest finds in the Biblical world’s most vibrant city.


As described in the Siloam Inscription, Hezekiah’s Tunnel was dug by two teams, who worked in opposite directions and met in the middle, to prepare for the invasion of Sennacherib. In the Bible, this impressive feat is detailed in 2 Chronicles 32:2–4.

The second argument concerns the amount of time it would have taken to dig Hezekiah’s Tunnel. Based on the type of rock in Jerusalem tunnels, geologists Amihai Sneh, Eyal Shalev and Ram Weinberger contend that Hezekiah’s Tunnel could have been hewn in no less than four years. Did Hezekiah have time to dig the tunnel before the arrival of Sennacherib? In the Bible, it does not specify the amount of time between the threat of attack and the siege itself, but Assyrian records shed light on the matter. (In the Bible History Daily web-exclusive discussion Regarding Recent Suggestions Redating the Siloam Tunnel, leading archaeologists Aren Maeir and Jeffrey Chadwick propose that Hezekiah had ample time to construct the tunnel during the revolt against Assyria.)

The final argument hinges on the relationship of the various channels of the water system in Jerusalem. Tunnels were dug in very different periods, ranging from the Middle Bronze Age to the Second Temple period.

Ronny Reich and Eli Shukron, who have excavated the City of David near the Gihon Spring extensively, believe that the starting point of Hezekiah’s Tunnel was Tunnel IV, which is connected to the Round Chamber of the Rock-cut Pool. At the entrance to Tunnel IV from the Rock-cut Pool there is a place that had been smoothed for a plaque. The similarity between this plaque and the Siloam Inscription supports the idea that Tunnel IV marked the beginning of Hezekiah’s Tunnel, just as the Siloam Inscription marked its end.

Ronny Reich’s Excavating the City of David is the definitive book on the City of David, the oldest part of Jerusalem. Find out more about the Siloam Tunnel, Warren’s Shaft system, Siloam Inscription, Theodotos Inscription and Pool of Siloam in this must-read publication.


In Jerusalem, tunnels—numerous and crisscrossing—of the water system are difficult to keep straight, but through their excavations in the subterranean levels of the City of David, Ronny Reich and Eli Shukron have mapped out the Jerusalem tunnels. The Siloam, or Hezekiah’s, Tunnel connects to the Gihon Spring via Tunnel VI. Reich and Shukron believe that the starting point of Hezekiah’s Tunnel was in Tunnel IV.

A house built on top of rubble fill, which blocked the entrance to Tunnel IV, was found in the Round Chamber. Some of the pottery in the fill under the house dates to the late ninth–early eighth century B.C.E. (Iron Age IIa)—which predates the time of Hezekiah by nearly a hundred years. Based on this pottery, Reich and Shukron date the house to the late ninth or early eighth century B.C.E. as well. According to the rules of deposition, Tunnel IV and Hezekiah’s Tunnel had to predate this house since debris underneath the house were used to block Tunnel IV. Additionally, if the two channels had not been dug, water would have continued to flow into the Rock-cut Pool, and the house would have been underwater. On this basis, Reich and Shukron argue that Tunnel IV and Hezekiah’s Tunnel must have been constructed by one of Hezekiah’s predecessors, dating as early as the time of King Jehoash (835–801 B.C.E.)—a century before Sennacherib’s siege of Jerusalem in 701 B.C.E.

Is Jehoash actually responsible for “Hezekiah’s” Tunnel?

Subscribers: Read Hershel Shanks’s full article “Will King Hezekiah Be Dislodged from His Tunnel?” by BAR as it appears in the September/October 2013 issue of Biblical Archaeology Review.

Not a subscriber yet? Join today.

Jerusalem lies at the heart of Biblical archaeology. In the free eBook Jerusalem Archaeology: Exposing the Biblical City, learn about the latest finds in the Biblical world’s most vibrant city.

Click here to visit a new page on Hezekiah’s Tunnel, featuring a web-exclusive discussion by Jeffrey Chadwick and Aren Maeir as well as links to over a dozen BAR articles on the tunnel.

This Bible History Daily feature was originally published on August 23, 2013.


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  • joseph says

    yeah i support what the 7th person explained,on my own side i see no reason to argue what is in the bible,because if they where not real then,it will not be there.

  • Jon says

    Another possibility is that some earlier kings had set out on this task before Hezekiah — [we know the Canaanites had already dug their own tunnel to the Gihon] — only for these kings to find it too costly to see it through to completion. Perhaps, Hezekiah was the first king to have the resources and the impending need to see this project to its end. This would resolve issues of rubble and pottery that predate King Hezekiah, which may exist due to earlier, failed attempts. It also helps with the time-frame of finishing the project, if say, the project was already a third of the way complete when Hezekiah took over. (Just a thought).

  • UVa says

    Sounds to me like someone just wants to try moving the dates. Do you people seriously think ancient scribes would write of a certain king (Hezekiah) building a tunnel in their most beloved book (to be read by other ancient people of the time), if it were not so? Anyone of ancient times would have known better, and would have also known who had it built.

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