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Seaway Valley Divers 14th Annual Pig Roast

Hi Everyone,

We will be hosting our 14th annual Pig Roast on Saturday, July 6th 2024.

We will be offering you an opportunity to visit the Powerhouse. 

The Mille Roches Power House is located in Lake St. Lawrence, West of Cornwall. It is accessible only by boat. The Mille Roches Power House was built for the St. Lawrence Power Company, founded by M.P. Davis and incorporated on May 23, 1901. It was located close to the Cornwall Canal at Milles Roches and could generate up to 3,000 horsepower. Work began in the fall of 1900 and it was opened October 24, 1901. While the ownership changed hands several times, the plant stayed in operation until 1955 when it ceased to generate power. With the new Powerdam and Seaway nearing completion, a huge crane and ball were brought in and the building (brickwork) demolished in preparation of the inundation. The generators were removed, but two water turbines remain intact.


This is a great dive with plenty to see, but please remember to bring a light to see into the arched water release pit. Expect a 1 to 2 knot current (only during the descent and ascent). Once you enter from buoy, you arrive first at the intake gates, from there descend to the power house floor and wheel pit, the upper work lies at 35 feet with the power house at 55 feet and tailrace at 75 feet

As in past years we will offer a delicious meal, but we kindly ask all those who attend to bring with them a tasty side whether it be a salad, fruit or dessert platter or even your finest dish, whatever it is, we know it will be delicious. This year the meal will be $20.00 per person (children under 13 free).

We have made arrangements to camp at the Boys Scout/Cadets Camp on Friday, July 5th and Saturday, July 6th. Camping will be $20.00 per person, per night.

Cost for diving for members will be $20.00 for a one tank dive, $30.00 for a two tank dive and non members $30.00 for a one tank dive and $40.00 for a two tank dive.  As in the past we will provide a shuttle service to the Pontoon Boat who will be buoyed to the Power House

Please let us know if you are interested in participating in the fun event.

We will also be offering several guided DPV dives from the scout cadet camp. Divers must provide their own DPV (Scooters) to join. Cost per guided DPV dive will be $10.00. There is 3 sites marked out to choose from. 


For more information or to Reserve your Spots today, please contact Seaway Valley Divers at:


Kyle or Steve at O2ToGo Dive Centre at: or by phone at (613)936-2864

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