Impacts of Hydropower in Manitoba

On this page you can find a summary of the impacts associated with hydropower in Manitoba. These impacts are cross-cutting and complex. Despite our focus on Manitoba, these impacts are similar to mega-dam projects across Canada and globally.

We encourage you to contact us, if you notice we haven’t mentioned impacts that you or someone you know have experienced. 


  • Clear-cutting for transmission corridors
  • Death and physiological changes of fish
  • Displacement and drowning of wildlife due to unnatural erosion of shorelines
  • Islands die and/or disappear due to exceedingly high erosion due to flooding
  • Endangerment of Sturgeon due to river changes
  • Eradication of traditional medicines due to manipulation of water levels and clearing for transmission corridors
  • Flooding of plant habitat releases methane and creates waterway debris
  • Unnaturally fluctuating water levels causes shoreline erosion
  • Severe water quality reduction


  • External workers turn sites into hydro-dominated transient towns
  • Flooding of cultural sites and burial grounds, washing away of human remains
  • Forced relocation for the purpose of flooding results in a disconnection from ancestral lands 
  • Gender-based violence
  • Loss of traditional ways of life and knowledge 
  • Loss of food sovereignty and security
  • No access to safe drinking water, subjected to ongoing Boil Water Advisories
  • Rise in drug and alcohol abuse
  • Safety issues on lakes and rivers from debris and unstable ice
  • Systematically unaddressed racism, assaults


  • Communities who have partnered with Manitoba Hydro have not seen the benefits and profits promised 
  • Destruction of fisheries and traplines leading to a loss in livelihood 
  • Expensive monthly electricity bills, with no consideration for housing or the adverse impacts of hydro installations on lives and incomes 
  • Forced reliance on northern stores and their shockingly high food prices 
  • Forced transition to wage economy
  • High Provincial debt due to over-budget projects and unprofitable exports
  • Unjust water rentals and agreements

Impacts of Hydropower in Manitoba

Though the impacts of Manitoba’s hydropower go unnoticed by many, they can be devastating in the province’s Northern Indigenous communities where the majority of hydropower comes from.

The flooding of rivers to create reservoirs has submerged thousands of square kilometers of land. This leads to the release of methane as vegetation decomposes underwater, the loss of unique and valuable wildlife habitat, and more (see impacts summary). Reservoirs are used as water storage, meaning the flow of rivers and even lakes is controlled by Manitoba Hydro instead of natural seasonal processes. Fluctuating water levels are pushed to extremes in often failed attempts to maximize water flow and therefore, profitability. Policies such as the Augmented Flow Program, allow for unnatural water fluctuation, which causes vast erosion and destabilization of thousands of kilometers of shoreline.

The combination of slower currents from impoundment and increased sedimentation from erosion make the water muddied and murky – conditions that encourage algae blooms and promote increased accumulated levels of toxic methylmercury. Fish behavior changes too because they are hindered from migrating up/downstream and spawning habitats are destroyed. Many fish are injured and killed by turbines and their populations decline. The wildlife that feeds on these fish – already threatened by habitat loss – also start to experience population decline. The fish, game, and furbearers that remain are often unwell, inflicted with cysts or made inedible by the increased mercury content.

As a result, economies suffer. Fisheries are destroyed. Traplines are flooded or made inaccessible by fences where not flooded. Traditional livelihoods are irreversibly damaged and sharing land-based knowledge is interrupted. Communities experience a forced transition to a wage economy. In addition to these costs, members are subjected to monthly electricity bills upwards of $500 for the power produced on their ancestral lands. Communities that join partnerships with the hydro-company on these projects often find themselves incurring immense debt.

Hydroelectric developments also change a community’s structure. External workers come in to construct, maintain, and operate the generating stations. These workers live in “man-camps” that are in or very close to communities. The workers are not permanently situated at each site, they frequently migrate to and from these sites leading to a transient (constantly changing) population. This type of working environment has led to the introduction of drugs and alcohol into communities, resulting in a rise of substance abuse and social emergencies that communities continue to grapple with. Members of these now hydro-dominated communities live with racism, violence, and sexual assault, that have been systematically dismissed, ignored and historically covered up.

Where safety and well-being were once assured, hydroelectric developments have left uncertainty and fear. Boaters are threatened by the eroded debris that hide in the murky waters. They carefully navigate the waters watching for entire rotting tree trunks that may catch motors and lead to fatal accidents. Community members carefully navigate ice roads looking out for thinning ice with very fast undercurrents (when dams are opened), and air pockets between the ice and waters (due to quickly fluctuating water levels). Swimmers (often children) come out of the water covered in rashes, unable to enjoy the nature their parents experienced growing up. Boil water advisories continue unaddressed in an unending reminder of their now-contaminated drinking water.

All of these impacts culminate in the ongoing cultural genocide of Indigenous Peoples. Their traditional ways of life are lost to Manitoba Hydro as their economies collapse and they can no longer hunt, fish, or live as they used to. Indigenous communities are forced to relocate from their ancestral lands, and their cultural sites and burial grounds are flooded for the sake of economic gain.

Hydroelectric developments have significant impacts on the environment and Northern First Nations. Unfortunately, the image of “green,” “clean”, “low-impact” hydropower is a myth that disguises tremendous harm.

Why Should You Care?

Hydropower is the main source of Manitoba’s energy, and it comes at a great cost to First Nations’ communities. Staying silent on these issues lets Manitoba Hydro stay unaccountable to its First Nations partners, and legitimizes the corporation’s disrespect for the environment, Indigenous culture, and ways of life.

Manitoba Hydro has profited for over a hundred years at the expense of its First Nation partners. It pushes for the development of devastating hydroelectric mega projects to make millions of dollars exporting power to the United States, and Indigenous communities pay the price a thousand times over. New partnerships like Wuskwatim and Keeyask are more of the same, with communities being saddled with millions of dollars in debt – on top of cultural and environmental costs – for a generating station that provides little or no economic benefit.

If nothing is done to stop them, Manitoba’s electrical utility will continue to destroy the environment, economy and culture, making the same promises of low-impact energy without the evidence or history to support them.

What Can You Do?

Manitoba’s long history of hydroelectric developments cannot be dismantled overnight, but there are ways to raise awareness and slow or even begin to reverse the ongoing devastation to Manitoba’s North:

Educate yourself and others on the real impacts of Manitoba’s electricity. We can’t demand justice for a problem, if we don’t know it exists.

Follow other energy justice organizations**  to get involved in their current campaigns, whether they’re demanding accountability from Manitoba Hydro, protesting harmful legislation, or calling out corporate misinformation.

** Energy Justice  organizations**

Green Action Centre, GAC

Interchurch Council on Hydropower

Manitoba Energy Justice Coalition, MEJC

Manitoba Eco-Network, MB EcoNetwork

North American Megadam Resistance Alliance, NAMRA