“Mayday, mayday! Saint-Jean-Vianney is sinking!” Let me tell you about a village that vanished not by fire or war but by earth turning to liquid. This is the story of Saint-Jean-Vianney.
Saint-Jean-Vianney was once a village in Quebec’s Saguenay-Lac-Saint-Jean region. It existed as a parish municipality since 1935. It became a village in 1951. By 1971, Saint-Jean-Vianney housed 1,266 residents.
But unbeknownst to its inhabitants, Saint-Jean-Vianney was built on Leda clay. This subsoil can liquefy under stress. The village’s location near the Saguenay River added to the danger.
Heavy rains in April 1971 saturated the clay. Pockets of clay began to dissolve. Residents noticed cracks in streets and driveways. Some houses sunk a bit into the soil. Strange noises echoed from underground.
On May 4th, 1971, at 10:45 p.m., disaster struck. The earth dropped dramatically, forming a canyon. A river of liquefied clay surged toward the Shipshaw River. It swallowed homes whole. The landslide stopped before midnight. Forty-one homes were destroyed. Thirty-one lives were lost.
The landslide left a massive crater. It covered 324,000 square meters. Its depth ranged from 15 to 30 meters.
Saint-Jean-Vianney was deemed uninhabitable. Survivors were resettled in Arvida over the next six months. Both the landslide site and Arvida now belong to Saguenay.
Research revealed a chilling fact. Saint-Jean-Vianney was built on the site of a landslide from 500 years prior.
The disaster occurred during a Montreal Canadiens playoff game. Many were awake. This likely saved lives. Darkness fell after a power outage. People fled in panic as homes sank into the mud.
Emergency services and Red Cross teams responded swiftly. They provided essential aid to displaced residents. Around 1,700 people were relocated. The Quebec government moved over 200 houses to Arvida.
Today, Saint-Jean-Vianney remains uninhabited. A small park near Shipshaw commemorates the tragedy. A museum exhibit at Saguenay’s Place du Presbytère also remembers Saint-Jean-Vianney.
Landslides are often triggered by heavy rain or melting snow. They can occur anywhere. The most destructive landslides in Canada have been in British Columbia, Alberta, Ontario, and Quebec. Saint-Jean-Vianney stands as a stark reminder of nature’s power. It is a place where the earth turned against its people.