Engineers will be allowed to do any work necessary to ensure the Tabqa dam continues to function.
Tens of thousands called for an end to the two-year conflict that has left thousands dead.
The Iraqi military blames so-called Islamic State booby-traps for residents' deaths.
Assessing Trump's approach to defeating so-called Islamic State
BBC reporter's shock of going home to war-torn Yemen
Tales of IS tyranny emerge as grip loosens on Mosul
Lyse Doucet reports from Syria's Palmyra after IS destruction
Little fanfare as Egypt's former political giant goes free
Syria national team prepare for World Cup qualifier
Broadcast time 14:06 BST - 15:00 BST
Broadcast time 16:06 BST - 17:00 BST
Broadcast time 17:06 BST - 18:00 BST
Broadcast time 19:06 BST - 19:30 BST