Satellite reconnaissance of this site, near the Arab village of Eilabun, has led analysts to believe that it is some sort of strategic military facility. While open source material cannot confirm the true nature of the site, SIPRI reports that the facility may store nuclear artillery shells and possibly Atomic Demolition Munitions (ADM) in underground bunkers similar to those found at Sdot Micha. [1]

Source:

[1] Hans M. Kristensen and Joshua Handler, "Appendix 10A: World Nuclear Forces," in SIPRI Yearbook 2002: Armaments, Disarmament, and International Security, Stockholm International Peace Research Institute (Oxford: Oxford University Press, 2002), p. 565; "Israel Nuclear Production Capability," Jane's CBRN Assessments, 1 December 2009.