The City of Surrey says it will be removing derelict boats from the Nicomekl River this month.
The city says boats have been illegally mooring on a narrow section of the river, dumping raw sewage and garbage into the water, and creating hazards for other boaters.
The cleanup effort is being conducted in partnership with Transport Canada.
Mayor Brenda Locke says the river has many spots where boats can legally drop anchor and there's no reason for boaters to illegally moor their vessels.