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Our Future River

Improved Fish Habitat
Removal of the Hogansburg Dam will return a free flowing river, fostering a healthier, more natural riparian ecosystem and providing connectivity between the St. Regis and St. Lawrence Rivers. Dam removal will open up 274 miles of river and stream habitat within the St. Regis River watershed, which will be beneficial to and expand the range of numerous fish species, especially the migratory species. Fish will be able to reach a variety of previously inaccessible spawning habitat. Additionally, remnant populations above the dam will have the benefit of increased genetic pool diversity. Over time, increased habitat could mean more fish with more nursery habitat for juveniles. The greatest potential impacts are expected for Atlantic salmon, American eel, walleye, lake sturgeon, northern pike, and muskellunge.

small atlantic salmon
small sturgeon
What Will the River Look Like?
The greatest change in water elevation will occur from the Hogansburg Dam up to the State Route 37 bridge. From the bridge, a natural pool will be revealed that extends upstream. The impact of dam removal diminishes with distance upstream. Below the Hogansburg Dam, there will be very little change, as water levels are controlled by the St. Lawrence River.
Hydraulic Modeling:
These maps are the result of modeling water conditions pre- and post-removal for summer high flows. Water depths are shown with a color spectrum, with the greatest depth shown in purple, moving towards the shallowest depth indicated in red. Notice the differences between the two models. The greatest change in water depth is in the area between the dam and the bridge, where some of the deepest sections will become the shallowest within the shown river reach. Farther upstream there is less of a difference between the two models. The natural pool can be seen above the bridge, and the conditions below the dam can be seen to be unchanged between the two models.
existing depthpost removal depth
River models also show water velocities pre- and post-removal for summer high flows. On the color spectrum slower velocities are shown in purple and blue and faster velocities are shown moving towards red. Notice areas where velocities are expected to increase correspond to the areas expected to see the greatest change in water elevation. As in the water depth models, the velocity models show less differences farther upstream.

Click the individual pictures for pdfs of the models.
existing velocitypost removal velocity
As the most prominent feature of the Project, the powerhouse will remain as a representative of the Project history and operation after the dam has been removed and the river restored. The powerhouse is a community landmark, clearly visible from the State Route 37 bridge. The Tribe is actively looking for ways to implement a cultural tourism strategy, specifically the creation of an Art Park on project lands. Following dam removal, the powerhouse will be saved and rehabilitated for future use, allowing community members to examine and observe the historical structure, and ensuring long-term maintenance and care for the building. The Project Lands on both sides of the river will be developed to enhance the multi-use features with green space, parking, and public access to the river.
outside view of powerhouse during winter

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Saint Regis Mohawk Tribe Environment Division