“Ice regulator” once was a fitting name. Today we call it Estacade du Pont Champlain. This structure stands parallel to the Champlain Bridge. But what purpose does this bridge-walkway serve?
Let’s step back to the early 1960s. Montreal was preparing for Expo 67. Construction altered the flow of the Saint Lawrence River. Concerns arose about ice jams and erosion.
To combat these issues, the Estacade du Pont Champlain was built in 1964 and 1965. Its primary function was to control ice formation. It managed ice movement in the Laprairie Basin. This ensured smoother navigation to the Port of Montreal. It also protected the islands from erosion especially those prepared for Expo 67.
Originally, it had a unique ice-control system. The Estacade featured vertical beams within its 72 pillars. These beams trapped ice. The structure encouraged early ice cover in the Laprairie Basin. It retained ice from the Lachine Rapids. This reduced new ice formation and controlled spring breakup.
Interestingly, engineers found the pillars alone were effective. The close placement of the pillars naturally stopped ice. No need to lower or raise beams. The ice simply halted against the “ice regulator”.
For years, the Canadian Coast Guard managed the Estacade du Pont Champlain. They even used it as a base for air-cushion vehicles in the 1970s. These hovercrafts acted as icebreakers. They cleared ice jams in the Chateauguay River. They also broke ice in the Saint Lawrence Seaway. This helped to extend the navigation season.
Around 1998, the Coast Guard relocated. Ownership transferred to the Jacques Cartier and Champlain Bridges Incorporated.
Today, the Estacade du Pont Champlain is different. It is no longer actively used for ice control. Icebreakers manage that task now. However, it has found new life as a recreational path.
Since the late 1990s, it has been a popular spot for cyclists and pedestrians. The path connects Île des Sœurs to the St. Lawrence Seaway dike. It forms part of Quebec’s Route Verte.
Imagine cycling along the Estacade. You’re surrounded by the Saint Lawrence River. You see the Champlain Bridge beside you. It stretches 2,043 meters long and 18 meters wide. That is an impressive sight.
The Estacade du Pont Champlain has 72 concrete pillars supporting it. They stand 10.5 meters tall. The deck itself is made of pre-stressed beams and concrete.
In 1965, this structure cost around $18 million to build. There were plans to add a light rail line. Though the project never advanced beyond planning.
The Estacade du Pont Champlain offers stunning views of the river. It is open from April to December. It is a unique way to experience the Saint Lawrence. It also provides a glimpse into Montreal’s engineering history. So next time you are looking for a unique perspective and some exercise, remember the Estacade du Pont Champlain.