The Niagara Queen II is a small icebreaker that Ontario Power Generation uses to keep the inlet ports open at their plant on the Niagara River at Niagara Falls.
[2][3][4] Niagara Queen II is a shallow draft river vessel designed by OPG and STX Marine.
She replaced the Niagara Queen, a modified tugboat icebreaker operated by Ontario Hydro and now with OPG.
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