With the nation searching for clean energy solutions, a recent commentary by Ron Way ("Is hydropower green? Not really," Nov. 15) asked Minnesotans a valid question: Is hydropower green? The author's conclusion, however, is at odds with the facts, the Department of Energy and the American people. Hydropower isn't just a renewable — it's the nation's largest source of renewable energy, accounting for half of all generation of renewable energy.
At the national level, hydropower is combating climate change more than any other renewable resource. Thanks to hydropower, the U.S. avoids approximately 200 million metric tons of CO2 annually — the equivalent of taking 42 million cars off the road.
And, lest we forget, hydropower plays a significant role in bringing intermittent renewable resources to the grid. This is a real issue in Minnesota, which as of 2013 ranked seventh in the nation in net electricity generation from wind energy. The addition of wind is made possible only because of flexible energies like clean hydropower or natural gas that can adapt quickly to the ever-changing, moment-to-moment availability of wind generation. Hydropower is the only renewable that can help stabilize and integrate these intermittent renewables and facilitate more to come online.
We also can't ignore the significant advances in environmental stewardship technologies that allow for the efficient passage of fish both upstream and downstream of dams. To be sure, the industry invests hundreds of millions in fish mitigation technologies and practices, as well as fish and wildlife protection, along thousands of miles of U.S. rivers.
At the same time, hydropower provides seasonal releases to support white-water kayaking and flat-water recreational opportunities at hundreds of lakes across the nation. Angling opportunities for bass, walleye and northern pike at the Fish Lake Reservoir Dam in Duluth are just one example in which hydropower supports Minnesota's sporting traditions.
Despite these well-established and significant benefits of hydropower, Way chose to focus on outdated and one-sided criticisms of hydropower. Yet hydropower is poised for resurgence, and it stands ready to not only expand its clean energy output but to increase the nation's energy portfolio by bringing on other renewables (wind and solar).
For example, 97 percent of the nation's existing dams do not generate power. Powering even a portion of those dams could provide nearly 5 million more homes with renewable energy.
Everyone from grid operators to regulators to policymakers has started to recognize hydropower's value in helping us reduce our reliance on fossil fuels. And this resurgence has caused many of the old, intractable opponents of hydropower to become nervous.