CAMBRIDGE — Four months after a tanker truck crashed and spilled tens of thousands of litres of jet fuel onto Highway 401 and into surrounding waterways, the Grand River Conservation Authority says there is "no risk" associated with the spill at the Shade's Mills reservoir.

The reservoir had been closed to ice fishing after the spill, and earlier this spring the conservation authority advised park visitors not to participate in water activities such as swimming, boating or fishing until a full assessment of the reservoir could be completed.

The Region of Waterloo also shut down two nearby wells as a precaution.

In a news release Friday, the conservation authority said that based on reports from the Ministry of the Environment, Conservation and Parks, and in consultation with Waterloo Region Public Health, it had concluded "there is no risk associated with the jet fuel spill contamination at Shade's Mills reservoir. This includes recreational activities such as fishing, boating and swimming."

In the early morning hours of Jan. 13, a tanker truck rolled over on the 401 near Highway 6 North and about 50,000 litres of jet fuel spilled out. Some of the kerosene-based fuel made it into Mill Creek, which winds its way southwest through Puslinch Township and into Cambridge.

It's not known exactly how much of the fuel ended up in the waterway.

The truck, from Fromet Fuel Carriers, had swerved to avoid an abandoned car sitting sideways in the right hand lane without any lights on. The car had been involved in an earlier collision and the driver had left the vehicle.

Fromet's insurance will pay the bill for the environmental cleanup. The truck driver was not seriously injured and was not charged.

jjackson@therecord.com

Twitter: @JamesDEJ