South African officers said that until now there was an unwritten agreement not to interfere with the dam complex.
They had been stationed in the vicinity of Haditha Dam in western Iraq, providing security for a nearby US Marine camp and patrolling the dam complex.
It is the second dam of a two dam complex.
René-Lévesque is a two dam complex.
The dam complex is expected to cost upwards of $16 billion and the transmission lines $2.5 billion.
Though argued to be a relatively small area for a dam's energy output, this output cannot be fully obtained without the construction of other dams planned within the dam complex.
The twin dam complex will thus have a joined reservoir with a storage capacity of about 2.7 billion cubic meter of water.
A Chilean court has overturned a three-month suspension of a project to build a giant hydroelectric dam complex in the Patagonian wilderness, which environmentalists say will destroy a unique habitat.
Last February the mayors of about 50 towns near the project signed a petition demanding a moratorium on new construction or use of the dam complex.
Additionally, planned Kara kurt dam complex will result in loss of over 80% of the suitable habitat.