Authority's sewage waters flow freely into the Kidron stream causing severe environmental damage in the Judean desert and the Dead sea area. In a rare collaboration with the Palestinian Authority, Hagihon is leading the Kidron stream restoration project with a budget of close to a billion shekels. According to the plan the sewage flow to the stream will be stopped and diverted to a new collection line, through an 8-km long pipe to the Og purification facility. To avoid damage to the natural valley as well as to the Marsaba Monastery and other archeological sites, the route of the sewage line was diverted from the stream itself, through a 60 meter deep 1.3 km long tunnel. The project also includes the construction of a hydroelectric station to generate green electricity. The purified water will be used for agriculture and irrigation of palm groves in the Jordan Valley and the Palestinian Authority. References External links Pictorial Compendium of Kidron Valley on Madain Project Photos of the Kidron Valley at the Manar al-Athar photo archive Hebrew Bible valleys Geography of Jerusalem Landforms of Jerusalem District Valleys of Israel Judaean Desert