Already in 1865, the farm prospered thanks to the demand of the forest contractors who ascended the Saint-Maurice River, on the ice at the beginning of winter and coming back down to the spring with their herds of horses and workers.
Mr. Olschamp was the first provider in the sector for agricultural products for forest workers coming from the "Lower Mauricie" to work in the logging concession in Upper-Mauricie.
The family home constituted a halt (with lodging and meals) for travellers, while the horses were housed in public shelters or barn.
In 1887, the Bishop of Trois-Rivières, lord Louis-François Richer Laflèche, officially designated the mission "Saint-Théodore-de-la-Grande-Anse”, in memory of the brave.
[1] The designation "Grande Anse" was formalized on December 5, 1968, at the Bank of place names in Commission de toponymie du Québec.