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Rupert dam—the project's main dam—is located 314 km from the mouth of the Rivière Rupert and will divert part of the flow from the Rupert northward.
|Structure||Type||Maximum height (m)||Crest length (m)||Volume of fill (m3)|
|Dam||Rockfill||28.6||470||644,000 (including cofferdams)|
The spillway is located to the left of Rupert dam. In addition to discharging floodwater, it releases the instream flow and discharges any flows in excess of the maximum flow of 800 m3/s that is diverted to Eastmain 1 reservoir through the transfer tunnel.
|Number of gates||3|
|Maximum flow||3,470 m3/s|
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