Summary
Highlights
The video discusses the historical context of dam building in the U.S., explaining how dams were initially built to power machinery and later became a significant source of hydroelectricity. It highlights the severe consequences of dam failures, such as the Johnstown Flood, and the establishment of the national fish hatchery system as an attempt to mitigate the damage caused to fisheries. Famous dams like the Hoover Dam and Grand Coulee Dam are showcased as symbols of engineering prowess, but the film also touches on the environmental destruction caused by these projects, including the flooding of Yosemite's Hetch Hetchy Valley and Glen Canyon.
The narrative shifts to the modern era, focusing on the growing movement to remove dams. The removal of the Edwards Dam on Maine's Kennebec River is cited as the first major dam removal in U.S. history. The film then details the largest dam removal project in U.S. history on Washington's Elwha River, emphasizing the hopes for ecological recovery and the spiritual significance of river restoration for Native American tribes. The controversy surrounding dam removal is also presented, including arguments from those who believe dams are essential for progress and those who advocate for their removal to restore natural ecosystems.
The film explores the devastating impact of dams on salmon populations, particularly in the Pacific Northwest. The Columbia and Snake Rivers, once teeming with wild salmon, have seen their populations drastically reduced due to dams. The four lower Snake River dams are singled out as particularly destructive, and the film includes an interview with a former Army Corps of Engineers employee who argues for their removal. A segment where the filmmakers attempt to kayak through the Snake River locks highlights the difficult access for both fish and recreational users.
The video delves into the controversial role of fish hatcheries in salmon conservation. While hatcheries are intended to boost fish populations, the film argues that they often produce weaker, less adaptable fish that can harm wild populations. The example of the Elwha River dam removal, where a new hatchery was built despite the goal of restoring wild fish runs, illustrates the ongoing debate. The film advocates for trusting nature's ability to restore itself, emphasizing the resilience of wild fish species like steelhead.
The story of Glen Canyon, flooded to create Lake Powell, is presented as a tragic example of environmental destruction. The 'salvage' efforts to document archaeological sites before they were submerged are discussed, alongside personal reflections from those who experienced the canyon before the dam. The film touches upon the environmental movement sparked by the flooding of Glen Canyon, including Edward Abbey's 'The Monkey Wrench Gang' and the direct action taken by Earth First! activists to protest the dam, such as painting a giant crack on its face.
The documentary concludes by reiterating the ecological benefits of dam removal, illustrating how rivers like the Elwha quickly begin to heal and salmon return following dam removal. It also showcases the more aggressive removal of the Condit Dam using explosives. The film emphasizes that dams have a finite lifespan and calls for a re-evaluation of every dam in the country to determine which ones still serve a valuable purpose in the 21st century. The proposed Klamath River dam removal project is highlighted as the most ambitious river restoration project to date, and the film cautions against new dam construction, such as the proposed dam on Alaska's Susitna River.