MONTREAL - Boat pilots on the St. Lawrence River are being asked to take cautions because of low water levels that can cause navigation hazards.

Kevin Lajoie, spokesman for the company that manages the St. Lawrence Seaway, says the corporation has restricted speeds in response to lower water levels on Lake St. Louis.

Francis Fortin-Legault of Canadian Hydrographic Service says ship pilots should be subtracting about 10 centimetres from the available depth of water in the St. Lawrence River compared to what's indicated on maps of the waterway.

Fortin-Legault says current water levels are reduced because of the operations of dams, but also because of a lack of rain in recent weeks.

The Canadian Coast Guard put out a notice on Aug. 6, warning that buoys between Montreal and Trois-Rivières

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