A River Returns

Discussion in 'Conservation, Fishery Politics and Management.' started by agentaqua, Jan 23, 2015.

  1. agentaqua

    agentaqua Well-Known Member


    In Washington state, a river once known for its abundant salmon run is getting a second chance. The Elwha River dams, which decimated salmon populations and profoundly altered the ecosystem, are coming down and hopes are high that salmon will return.
     
    Last edited: Apr 27, 2020
  2. shuswap

    shuswap Active Member

    I liked this video. Thanks for sharing.
     
  3. agentaqua

    agentaqua Well-Known Member

    http://america.aljazeera.com/multim...ery-pits-environmentalists-against-tribe.html

    Return of the fish wars: Hatchery pits environmentalists against tribe

    by E. Tammy Kim -@etammykim |April 22, 2015 5:00AM ET

    Can anything wild still exist in a Washington river that has been plugged for 100 years?

    Elwha River
    Chris Wilson / The Washington Post / Getty Images

    LOWER ELWHA KLALLAM RESERVATION, Wash. — The Elwha, like so many coastal Natives, are salmon people. Their history of dugout canoes and hundred-pound chinook is inseparable from the glacial river that shares their name.

    In late August, timed to the fall runs of fish, the Lower Elwha tribe holds the annual First Salmon ceremony at the gravelly mouth of the river. Lola Moses, who oversees the tribal court, presides over a small crowd of members, children from the reservation’s Head Start program and a few visitors. A flayed salmon rests on a plastic folding table.

    Moses helps cradle the fish on a pine bough and carries it to the water’s edge. Peyton Cable, 14, wades then dog-paddles in and floats the offering downriver, calling forth the next year’s runs. To a plain drumbeat, the tribe sings deep-throated warrior chants and the melodic “Klallam Love Song.”

    “I’m so proud of the Elwha,” Moses says. “The river is free. It’s cutting new paths and going down old paths.” For the first time in more than a century, there’s no concrete holding the river back. The largest dam-removal project in U.S. history has given this ecosystem and its earliest residents, the Lower Elwha people, a second chance.

    elwha river watershed

    Map of Elwha watershed and former dam locations.

    Map of Elwha watershed and former dam locations.

    Source: Olympic National Park.

    Historically, the Elwha was among the region’s most productive rivers, home to 10 varieties of anadromous salmon and steelhead trout. These fish are born in freshwater creeks, then spend their adulthoods mining the vast nutrients of the sea. They make a final journey home to mate and die, feeding bears, eagles and insects as they decompose. But the damming of the Elwha River for hydropower in the early 20th century — without passages for fish, in violation of an 1890 law — blocked off 90 percent of upstream spawning ground for some 400,000 fish and turned the legendary king salmon, or chinook, into myth. The Klallam (“strong”) people, like the salmon they depend on for food and spiritual sustenance, were displaced and dwindled in number. There are now fewer than 700 Lower Elwha people, according to the U.S. Census; the tribe counts approximately 1,000 registered members.

    In 1992, the tribe won a long battle to remove the dams and rehabilitate the entire watershed. The Lower Elwha and their federal partners — the National Park Service, Fish and Wildlife Service, Bureau of Reclamation, National Oceanic and Atmospheric Administration and U.S. Geological Survey — took the lead on this vast, $325 million project. The first blast of dynamite came in 2011; last year, the Elwha River saw its best returns of fish in three decades: 4,500 adult chinook and 1,200 steelhead, the two most critical species.
    Cable
    Lower Elwha member Peyton Cable participates in the tribe's annual First Salmon ceremony, a ritual of harvest, in August 2014.E. Tammy Kim / Al Jazeera America

    But some of the restoration work is unfolding at a new hatchery on the Lower Elwha reservation. There, thousands of spawning adult fish are captured for their sperm and eggs, resulting in millions of artificially bred juveniles.

    The tribal hatchery is controversial: a dark stain upon a rare, hopeful environmental story. In 2012, a few months after the dam removal began, Wild Fish Conservancy and three other nonprofits sued to stop the Elwha hatchery from releasing so many tiny fish. The tribe itself was not a defendant in the case, but its hatchery managers were, along with several federal agencies.

    Plaintiffs argue that a hatchery has no role in a wild, undammed river and that the release of genetically inferior, artificially bred fish will harm varieties protected by the Endangered Species Act. They further allege that the federal government failed to consider less harmful options, such as releasing fewer manufactured fish, in planning the restoration.

    The lawsuit turns on a narrow scientific dispute: whether a hatchery program will support or endanger native salmon and steelhead in the Elwha. It also raises vexing, far-reaching questions: How much human intervention is needed to nurse a watershed back to health? Do culture and tribal fishing rights undermine conservation? And in a river plugged up for 100 years, is there any wild thing left?

    Fish wars forever

    In February 1914, wealthy industrialists gathered in far-flung Port Angeles, Washington, to celebrate a new hydropower facility, the latest taming of the Northwest wilderness. The Elwha Dam, built just five miles upstream, promised electrified civilization amid scattered indigenous villages, old-growth forests and crystal rivers bubbling with salmon. To settlers, everything in sight was an unexploited resource.

    The Elwha Dam was constructed, illegally, of impenetrable concrete. Up the spawning salmon came, returning from the ocean, only to ram their heads against the wall. Its builder, industrialist Thomas Aldwell, knew of the state law requiring all dams to include passage for fish, but neither he nor his allies in the state government cared to comply. The protests of a local game warden and the area’s first people, the Lower Elwha Klallam Tribe, were ignored. Acres of land were flooded by the dam, and the tribe’s right to fish in its “usual and accustomed” areas under the 1855 Treaty of Point No Point was erased. Instead, two years after the dam’s completion, the state simply required Aldwell to add a perfunctory fish hatchery as a substitute for wild runs.

    Things got much worse. In 1927, a second wall, the Glines Canyon Dam, was built farther upriver — again, without fish passage, even after the surrounding land was named part of Olympic National Park. State-run salmon and steelhead hatcheries were built to replace the failed one Aldwell had constructed.
    The damming of Washington’s Elwha River in the early 1900s destroyed an age-old ecosystem of salmon and steelhead trout. It also set a precedent across the West for letting hatcheries do the job of reproduction. The Elwha was recently undammed, part of the largest river-restoration project in U.S. history — but it still hosts controversial hatcheries. In this photo from August 2012, workers from the state wildlife department prepare to net adult Elwha salmon in order to collect their eggs. John Gussman

    Chroniclers of the region say the Elwha deal set a bad precedent. Dam-hatchery projects became ubiquitous in the 20th-century American West. Today, Washington alone has 83 hatchery facilities run by the state, 51 by tribes and 12 by the federal government. Billions of dollars have been spent to manage and multiply fish, but salmon populations continue to shrink year after year.

    At the same time, well into the 1960s, state wildlife departments prevented Native Americans from exercising their treaty fishing rights. Game wardens policed Northwest rivers in favor of white sportsmen and routinely brutalized tribal fishers. In Washington, Billy Frank Jr., a civil-rights activist with the Nisqually tribe, was jailed dozens of times, and actor Marlon Brando was arrested at a 1964 “fish-in” with Puyallup leaders. The humiliations and violence of these decadeslong Fish Wars are still fresh.

    “My mother was on the tribal council, and she would get [Elwha fishermen] out of jail,” recalls tribal elder Serena Antioquia, 75. Later, Antioquia made sure her own children learned how to fish. Her daughter Rachel Hagaman is now a commercial fisher; her other daughter, Lola Moses, emceed the First Salmon ceremony last August.
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  4. agentaqua

    agentaqua Well-Known Member

    Elwha Dam circa 1991
    A 1991 photo of the Elwha Dam, built without any fish passage in the early 20th century. Its demolition began in September 2011.Gary Stewart / AP

    It wasn’t until a federal investigation into state enforcement of wildlife laws and a subsequent court ruling in 1974 that Olympia began to respect the tribe’s 19th-century treaty rights. U.S. v. Washington, known as the “Boldt decision” after the first presiding judge, held that local tribes are entitled to 50 percent of total catch and that, as sovereign nations, they should co-manage fisheries on equal footing with the state.

    The decision came down not long after the federal government granted the Lower Elwha Klallam Tribe 372 acres of reservation land along its ancient river. Encouraged by these developments, the tribe launched Klallam language and history programs in the late 1970s and established its own hatchery to augment depleted fishing areas and earn much-needed income. “We had a rotation where between 10 and 20 people from the tribe would make a living from the small runs coming through the river,” recalls Robert Elofson, the Lower Elwha’s river-restoration director and a commercial fisherman. The tribe also began to campaign for an audacious, seemingly impossible goal: an undammed Elwha River.

    In 1986, the tribe sued the federal government, seeking to dismantle the Elwha and Glines Canyon dams. The river’s hydropower facilities were by then nearly obsolete, producing less than half the electricity needed to fuel an adjacent paper mill. Politics had shifted, too: Native Americans were key players in natural-resources management; fishing rights were federal law. And environmental activists inspired by the civil rights movement were calling for wasteful, outdated “deadbeat dams” to be demolished.

    “Free the Elwha!” became a rallying cry in the Northwest. Protesters donned fish costumes and picketed outside Olympic National Park headquarters. A new generation of federal officials was willing to listen. “The dams were not natural, and they should not have occurred in the national park,” says Chuck Janda, then the park’s chief ranger. “It’s like having a roller coaster up on Hurricane Ridge, and parks are not for that sort of thing. Parks are not a Disneyland; they’re not a zoo.”

    TKTKTK
    The Elwha Dam in August 2011, just before removal began, and again in March 2012.John Gussman

    Feelings were just as strong on the opposing side; business interests and old-timers in town clung to what the dams represented. They felt a deep nostalgia for the industrial dream of Port Angeles and the tamed version of nature — lakes and dykes and hatcheries — that a man-made Elwha had introduced. “Early on, when they were talking about removing the dams, it took me a long time to buy into it. There was an ecosystem that had evolved over many, many years. There were a lot of birds nesting on those lakes,” says Arnold Schouten, a local surfer and business owner.

    After years of lobbying and debate, the tribe and its allies prevailed. Congress passed the Elwha River Ecosystem and Fisheries Restoration Act [PDF] in 1992, authorizing the “removal of the dams and full restoration of the Elwha River ecosystem and native anadromous fisheries.” It was a historic win, though it would take nearly 20 years of negotiation, planning and study before the first pieces of the dams fell away.

    The Lower Elwha tribe has played a critical role in the river-restoration project. Its team of scientists has worked with the National Park Service and other federal agencies to study virtually everything in the watershed: salmon, river otters, elk, birds, vegetation, boulders, logjams and the sediment coming downriver. Salmon, above all, have always been the focus — wild fish, primarily, but hatchery fish, too [PDF].

    On Sept. 16, 2011, the day before a celebration marking the inaugural dam blast, the tribe and its federal partners received a notice of intent to sue [PDF] from lawyers for Wild Fish Conservancy. The tribal hatchery, they alleged, had violated the Endangered Species Act and ignored the “serious ecological risks that hatchery fish pose to native salmonids.” By February 2012, the case had begun its long journey in federal court.

    elwha fish populations begin a decadeslong, post-dam recovery

    Salmon range expands after dams no longer block Elwha river.

    Sources: “2014 Elwha River Chinook Escapement Estimate Based on DIDSON/ARIS Multi-Beam SONAR Data” by Keith Denton et al., courtesy Lower Elwha Klallam Tribe; “2014 Elwha River Steelhead Escapement Estimate Based on DIDSON/ARIS Multi-Beam SONAR Data” by Keith Denton et al., courtesy Lower Elwha Klallam Tribe; George Pess, National Oceanic and Atmospheric Administration; Olympic National Park; Washington Department of Fish and Wildlife; “Summary of coho salmon redd surveys in middle Elwha River 2013/2014” by John McMillan et al. (2014); “Biological impacts of the Elwha River dams and potential salmonid responses to dam removal” by George Pess et al. in Northwest Science (2008); “Guidelines for Monitoring and Adaptively Managing Restoration of Chinook Salmon (Oncorhynchus tshawytscha) and Steelhead (O. mykiss) on the Elwha River” by Roger Peters et al., U.S. Fish and Wildlife Service (2014); “A comparison of pink salmon in Elwha and Dungeness rivers and Morse Creek using microsatellite DNA” by Maureen P. Small et al., Washington Department of Fish and Wildlife (2005).

    A necessary evil?

    About 500 people, more than half the Lower Elwha, live on tribal land. To outsiders, there isn’t much on the reservation: grassy fields; small, widely spaced houses; a community center resembling a high school. There’s no giant casino or outlet mall or crafts emporium as on larger reservations near Seattle. Most Elwha members are poor, though precise statistics are unavailable.

    In the late 1980s, the tribe commissioned an economic analysis of what it had lost in fishery revenue from the dams. The figure was $168 million — “and I thought that was conservative,” says Eric D. Eberhard, Indian law practitioner in residence at Seattle Pacific University. Salmon and shellfish have always been the tribe’s main economic asset: At the famed Pike Place market in Seattle, fresh chinook sells for $40 per pound. In Washington, salmon is a $1 billion business.

    The Elwha people are all fishers of a sort: for subsistence, recreation and commerce. “The median income for the tribe is still very low, so [the salmon] are an opportunity for some of the tribal fishermen to make some income,” says Elofson, the river-restoration director. “We’d like to see our tribe in an above-average position instead of trailing behind in terms of income and education.”

    Before the dams were removed, no one really questioned the existence of the state or tribal hatcheries, which bred several kinds of salmon and steelhead trout. How else would the dammed river support any fish? The Elwha Dam blocked everything upstream of River Mile 4.9, roughly 70 miles of riverine habitat. “If it wasn’t for the hatcheries, there probably wouldn’t be a chinook run in [the Elwha] system,” says Roger Peters, a biologist with the U.S. Fish and Wildlife Service and member of the Squaxin Island Tribe.

    A coho salmon being tagged and measured at the Lower Elwha Klallam Tribe hatchery west of Port Angeles.Chris Wilson / The Washington Post / Getty Images

    The Elwha hatcheries came under scrutiny as dam demolition began. For decades, the state, then the tribe, had bred a non-native strain of steelhead in the lower river. Scientists and environmentalists warned that this foreign fish, previously contained to just five miles of river, should not be allowed to colonize the entire Elwha. So the tribe eventually made two concessions: It stopped producing non-native steelhead and agreed to a five-year moratorium on all fishing in the Elwha to help the salmon recover [PDF]. http://www.fws.gov/wafwo/fisheries/Publications/FP208.pdf

    There was one thing the Lower Elwha refused to give up: its hatchery. The National Oceanic and Atmospheric Administration’s 2008 “fish restoration plan” [PDF] http://wildfishconservancy.org/copy_of_news/in-the-news/WFCElwhaESA60daynotice2014.07.17.pdf predicted that the millions of tons of gravel, sand, silt and rocks unleashed from behind the dams could kill hundreds, maybe thousands of Elwha fish, three types of which — native steelhead, chinook and bull trout — were listed as threatened under the Endangered Species Act. Letting the fish recover on their own, without any artificial reproduction, was an unacceptable risk from the tribe’s point of view.

    Yet the existing hatchery wouldn’t suffice. Dam removal was expected to overwhelm the aging structure due to rising groundwater levels and increased sediment flow. Thus, as part of the restoration, the tribe sought — and received — more than $20 million in federal funds to build a new hatchery.

    The facility opened in 2011. In photos, the immense complex — off-limits to journalists during the litigation — looks sleek and state of the art, equipped with incubation ponds, rearing “raceways” and a canal out to the river. It’s a point of pride for the Elwha people, whose four full-time workers trap, gaff, fertilize, feed, move and tag millions of juvenile fish every year. In 2015, the tribal hatchery will release 175,000 native steelhead, 425,000 coho, more than 1 million chum and 3 million pink salmon. The Washington state hatchery will send nearly 3 million young chinook into the Elwha and its tributaries

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    Last edited by a moderator: Apr 28, 2015
  5. agentaqua

    agentaqua Well-Known Member

    What the tribe sees as beautiful and necessary, hatchery opponents say is destructive and illegal. The lawsuit brought by Wild Fish Conservancy, the Federation of Fly Fishers’ Steelhead Committee, Wild Salmon Rivers and the Wild Steelhead Coalition takes aim at the tribe’s breeding of steelhead, which number between 500 and 1,000 in the Elwha and are notoriously difficult to breed in hatcheries. The nonprofits argue that putting hatchery fish in the newly undammed Elwha will “irreparably harm” threatened steelhead, in violation of the Endangered Species Act. The state’s nearby hatchery, which only breeds chinook, was immune from the suit because of an earlier consent decree.

    “In just one generation, you can do a lot of harm,” says Kurt Beardslee, executive director of Wild Fish Conservancy. “We are extremely sympathetic toward [the tribe], but they have a vested interest in harvesting soon and having income.”

    Independent ecologist Jack Stanford, an expert witness for the plaintiffs, told the district court that the tribe’s hatchery “will most likely cause severe and long lasting harm” to native Elwha steelhead. Sportfishing purists agree. “A lot of these hatchery fish that they’re raising on the Elwha are just little rags — little rats compared to the beautiful wild fish that nature has made for thousands of years,” says Dave Steinbaugh, a diehard fly fisherman who owns the Port Angeles store Waters West.

    The plaintiffs point to studies of Pacific salmon suggesting that hatchery fish do tend to be genetically inferior. In several rivers, manufactured salmon — and steelhead in particular — have had trouble mating and avoiding predators in the wild. Given all this, plaintiffs say, the tribe should either shut down its hatchery or reduce production from millions to tens of thousands of steelhead per year.

    A living river is as much about water as dirt. The sediment that carves riverine pathways, provides gravel for fish to lay their eggs and nourishes downstream beaches is a central focus along Washington’s Elwha River, where the largest dam removal and restoration in U.S. history continues to unfold. E. Tammy Kim / Al Jazeera America

    The problem with the plaintiffs’ evidence, say the federal agencies being sued, is that it can’t predict what will happen on the Elwha. Brian Winter, the National Park Service scientist leading the Elwha restoration, stated in an affidavit that, assuming the worst-case scenario — unrelenting sediment flows and blocked upstream habitat — hatcheries would be the only lifeline for local fish. Yet even the best hatcheries are fragile: In July 2013, a problem with the water pump at the new tribal hatchery killed more than 200,000 coho and steelhead.

    In their pleadings, the federal defendants express unyielding support for the hatchery. But river watchers and one scientist directly involved in the restoration (who asked to remain anonymous for fear of retaliation) point to dissent in the ranks. They say that many fisheries biologists employed by the Lower Elwha and the National Park Service oppose the hatchery but feel pressure to support the tribe. “Any time you ever criticize a tribe — and I totally understand this — people think there is a racist element to it,” says Beardslee.

    According to Kerry Naish, a University of Washington hatcheries expert not involved in the case, the science is unclear at best: To prove genetic loss, “you need lots and lots of generations. You need to be able to sample every four to five years for steelhead.” Another problem, Naish says, is that in rivers like the Elwha, where hatcheries have existed for a century, so-called wild fish may in fact be hatchery descendants.

    In March 2014, the district court ruled for the federal defendants on most counts, allowing the tribe to continue its work at the hatchery. But the judge did find that the government failed to consider the option of releasing fewer fish into the Elwha. The plaintiffs’ other claims are now pending before the Ninth Circuit Court of Appeals.

    Wild Fish Conservancy worries that the new Elwha hatchery will set a precedent for future dam-removal and restoration projects. It’s a particular concern in the West as momentum builds against deadbeat dams on the Snake and Klamath rivers, among others.

    There’s another, more insidious aspect to the hatchery debate — an echo of the Fish Wars. In salmon country, nontribal recreational and commercial fishermen often accuse Native Americans of taking more than their 50 percent share — and of using hatcheries to increase their catch. “It’s 95 percent the tribe. There’s no enforcement out here,” says Jerry Wright, who owns Jerry’s Bait and Tackle shop in east Port Angeles. “Those fish were originally supposed to be for the tribes, but they sell it to Japan and China. You see gillnets full of rotting fish.” In The Reel News, a local newspaper, articles complain about “Boldt-inflicted tribal fishing rights” and a state wildlife department that bows to Native interests at the expense of recreational sportsmen.

    Elwha fishers do sell their catch, but “So what?” supporters say. “The fishery is incredibly important to the tribes,” says attorney Eberhard. “People say, ‘They’re selling the fish!’ Well, yeah, they live in a cash economy. They’re also eating the fish.” The Northwest Indian Fisheries Commission, which represents the Lower Elwha and 19 other Washington tribes, emphasizes the peoples’ right to use and manage natural resources as they deem appropriate.

    Juvenile coho salmon feed at the tribal hatchery on the lower Elwha River.Steve Ringman / Seattle Times / AP

    “Conservation groups and some [scientists] would want to stop the hatchery on anadromous fish,” says Michael Gross, a biologist with Washington Department of Fish and Wildlife. “But the tribe has an interest in fishing [the Elwha]. The sportsmen can go elsewhere, but the tribe’s kind of stuck there, so they weren’t going to go anywhere.”

    All parties hope for an eventual sunset on human intervention [PDF]. http://www.fws.gov/wafwo/pdf/Peters et al 2014 Elwha Mon Adapt Mng Final.pdf “The plan all along has been to phase out the hatchery as far as the Elwha salmon are concerned,” says Elofson. At this stage, however, no one but Wild Fish Conservancy can say when that should occur.

    A date for oral argument before the appeals court has not been set. Meanwhile, both the state and tribal hatcheries have proceeded with their spring releases: 296,000 coho, 175,000 steelhead and 300,000 chinook destined for the sea.

    Hatchery lawsuits plead objective, scientific truth yet delve, implicitly, into the much thornier terrain of tribal sovereignty and resource management. “What is really being balanced are different human values for these fish,” says Mary Ruckleshaus, consulting professor at the Stanford Woods Institute for the Environment. “And that’s not a purely scientific judgment.” Fish biologists, hydrologists and engineers talk about managing the “four h’s”: hatchery, harvest, hydropower and habitat [PDF]. But they can’t and won’t decide what the priority should be — in any river, at any given time.

    Tribal renaissance

    The Lower Elwha’s sacred place, the “creation site” where the tribe originated, was said to lie along the river. In an Elwha history book, it’s described as a large rock with two deep depressions, an altar of divination and prayer “where the Creator bathed the people and blessed them.” But the stone vanished in 1913, drowned by the new Elwha Dam.

    In the summer of 2012, with both dams chipped away and the river resuming its natural course, the creation site re-emerged. Members of the Lower Elwha tribe hiked up the river and scooped water from the rock’s holes into little bottles. They fashioned them into necklaces for elders unable to make the trip.

    For the tribe, dam removal has afforded glimpses of a kinder time. Before white settlement, nearly a half-million anadromous fish swam up the Elwha every year, spawning and dying in their native streams. As recently as the 1920s, a tribal pamphlet reads, “The river was so full of fish that you could walk across on their backs, it was so thick.”

    Today, the salmon are returning, already in the low thousands — not bad by current standards. “Even if we have good runs coming back, we’re going to let them go back to the river for spawning,” says Elofson, referring to the moratorium. By 2017, when fishing resumes, he expects a modest catch, “the equivalent of what we had before.” In another 10 years, he hopes for something much more significant: a harvest big enough to lift the fate of the tribe.

    The hatchery, he says, is a necessary, if imperfect, step toward restoration. “We look at the long haul,” Elofson says. “We’re not going anywhere. We know we have things to protect.”

    Correction: This version of the story corrects the spelling of former Olympic National Park Chief Ranger Chuck Janda's name.
     
    Last edited by a moderator: Apr 29, 2015
  6. Dave

    Dave Well-Known Member

    Interesting read. Thanks aa
     
  7. agentaqua

    agentaqua Well-Known Member

    U R welcome. Interesting stuff anyways...
     
  8. agentaqua

    agentaqua Well-Known Member

    http://www.fws.gov/wafwo/pdf/Peters et al 2014 Elwha Mon Adapt Mng Final.pdf
    Guidelines for Monitoring band Adaptively Managing Restoration of Chinook Salmon (Oncorhynchus tshawytscha) and Steelhead (O. mykiss) on the Elwha River

    February 2014

    By R. J. Peters1, J. J. Duda2, G. R. Pess3, M. Zimmerman4, P. Crain5, Z. Hughes6, A. Wilson6, M.C. Liermann3, S.A. Morley3, J.R. McMillan3, K. Denton, D. Morrill7, and K. Warheit4
    1 U.S. Fish and Wildlife Service, Washington Fish and Wildlife Office
    2 U.S. Geological Survey, Western Fisheries Research Center
    3 NOAA Fisheries, Northwest Fisheries Science Center
    4 WA State Department of Fish and Wildlife
    5 National Park Service, Olympic National Park
    6 NOAA Fisheries, West Coast Region
    7 Lower Elwha Klallam Tribe

    Photos by John Gussman
     
  9. agentaqua

    agentaqua Well-Known Member

    http://www.opb.org/news/article/rivers-recovery-rapidly-once-dams-are-gone-study-finds/

    Rivers Recover Rapidly Once Dams Are Gone, Study Finds

    by Cassandra Profita OPB | April 30, 2015 11 a.m.

    When this photo was taken, about 3 million cubic yards of sediment had been flushed down the Elwha River since dam removal began in 2011. That’s only 16 percent of what’s expected to move downstream over five years.

    Katie Campbell/KCTS9 https://soundcloud.com/earthfix/damremoval
    https://api.soundcloud.com/tracks/2...n=&client_id=0f8fdbbaa21a9bd18210986a7dc2d72c
    A new study sums up what scientists now know about the environmental effects of removing dams from rivers.

    http://www.sciencemag.org/content/348/6234/496.summary?sid=f3a7cb41-7e9a-461d-af6a-f341f405c2ce

    http://www.sciencemag.org/content/334/6058/888/suppl/DC1

    http://www.sciencemag.org/content/suppl/2011/11/17/334.6058.888.DC1/888.mp3

    It concludes that rivers and fish respond quickly after a dam is removed, and the results are mostly positive.

    “Heraclitus has said you can’t step in the same river twice,”said study co-author Gordon Grant. “Well, you don’t get exactly the same river back after you take a dam off it that you had before, but you can come pretty close. In some cases, it can even be difficult to identify in just a few years where the dam was.”

    Rivers often disperse the extra sediment from behind a dam within weeks or months of dam removal, the study finds. Migratory fish move swiftly to recolonize newly accessible habitat – at times swimming past the former dam site within a matter of days.

    The research, published Thursday in the journal Science, compiles the findings of more than a hundred studies on individual dam removals.

    Grant, a research hydrologist with the U.S. Forest Service, said the number of dams removed has shot up in the past decade. In the U.S. 548 dams were removed from 2006-2014 compared with 298 dams removed from 1996-2005.

    That recent round of dam removal has included projects on Washington’s Elwha and White Salmon rivers and Oregon’s Sandy River.

    “We wanted to step back from the fray and assess: What have we learned?” he said. “What works, what doesn’t, and what sort of guidance does the past give us in looking towards the future?”

    Grant said the effects of dam removal definitely vary depending on the size of the dam, the size of the river, and how much sediment was stored in what size reservoir. But he and his colleagues did find some common lessons.

    Before dam removal had been studied, Grant said, scientists thought it might take decades for rivers to disperse the accumulated sediment. But that was not the case in almost all the documented cases. In most cases, it was only a matter of weeks or months.

    “Rivers appear very nimble in terms of being able to digest these meals of, in most cases, sediment that has been stored behind these structures, some of which have been in place for close to a hundred years,” he said.

    Study co-author Jeff Duda, a biologist with the U.S. Geological Survey, is studying the effects of dam removals on the Elwha River in Washington – the largest dam removal in history.

    Now that the dams are gone, rafters are enjoying the changing Elwha River.

    Ashley Ahearn

    He said the Elwha has been the biggest test case to date of how a river handles large deposits of sediment released by dam removals. That project started in 2011 and removed the last part of the Elwha Dam last August, releasing 21 million cubic meters of sediment altogether.

    “We’ve seen the river downstream handle that input of sediment, and it’s now coming back,” Duda said. “For awhile, it was running pretty muddy, and still does during high flows, but if you go out there during periods of low flow it runs pretty clear again. So, the river is adjusting.”

    Duda said scientists are still tracking the long-term effects on fish in the Elwha, but it didn’t take the fish long to reoccupy the habitat above the dams.

    “We saw fish here just upstream of Glines Canyon Dam within days of the final blast,” he said. “If you give the fish a chance, if they’re migratory, they will recolonize the streams above dams.”

    Overall, Grant said, fish seem pretty well adapted to handling the short-term, large volumes of sediment moving downstream after a dam removal, as it’s similar to what they might see during a flood or volcanic eruption.

    “Generally, the fish are reasonably evolutionarily designed to handle disturbances of that kind,” he said. “What we don’t know, though, is whether you get back the sort of fish community you might have had before the dam.”

    Researchers found removing a dam can release contaminants stored in sediment, and it’s a good idea to check for that before removing a dam, Grant said.

    In a case of “good dam removals gone bad,” he said, the Fort Edward Dam removal on New York’s Hudson River released so much contaminated sediment that the river was later placed on the Superfund list of the nation’s most contaminated sites.

    While there have been many positive results documented from dam removals, Grant said, the benefits of dams for water storage and energy – especially in light of climate change – may continue to drive people to build new dams.

    “The future of dam removal has to be viewed against this context of a lot of places in the world where dams are still viewed as important steps in development as low-carbon energy sources,” he said. “Our removals in the U.S. are offset in terms of total dams by a lot of new dam construction in South America, Southeast Asia and India.”

    http://www.sciencemag.org/content/334/6058/888.summary?sid=f3a7cb41-7e9a-461d-af6a-f341f405c2ce
     
    Last edited by a moderator: Apr 30, 2015
  10. calmsea

    calmsea Well-Known Member

    Somebody heard what's planned in the Sooke River?
     
  11. sierra1

    sierra1 Member

    How about BC Hydro has to remove some 100yr old small river dams in trade for Site C?


    Sent from my iPhone using Tapatalk
     
  12. bigdogeh

    bigdogeh Well-Known Member

    or remove the 100 year old dams and no site C...
     
  13. agentaqua

    agentaqua Well-Known Member

    New Model Predicts Fish Population Response to Dams
    FIS
    New model assesses dams impact on sea-run fish species
    Friday, May 29, 2015, 00:50 (GMT + 9)

    Researchers have developed a model to assess how dams affect the viability of sea-run fish species that need to pass dams as they use both fresh and marine waters during their lifetimes.

    NOAA’s Northeast Fisheries Science Center (NEFSC) and Greater Atlantic Regional Fisheries Office (GARFO) have partnered on this project to test how varying passage efficiency at dams related to survival rates for these species.

    Using a model of endangered Atlantic salmon in Maine’s Penobscot River as a case study, NOAA researchers found that abundance, distribution and number of fish increased upstream when dams in the primary downstream segments of the river, also called “mainstem dams,” were removed or fish passage survival was increased. The findings were recently published online in the ICES Journal of Marine Science.

    Models like this one, which analyze population viability based on a variety of biological, environmental, and functional factors, can be used to predict ecological responses of fish populations. They can also provide a way to evaluate and prioritize management and restoration actions for fish that migrate between fresh and salt water.

    Dams and low marine survival rates are two of the biggest threats to many diadromous fishes, which spend part of their life in freshwater and part in the ocean. Dams can prevent or impede fish passage and degrade the habitats upstream by inundating formerly free-flowing rivers, reducing water quality, and altering fish communities. They can also kill and injure fish during migrations. Direct mortality occurs when fish pass through turbines, over fishways, or through fish bypasses. Indirect mortality comes from increased predation in altered habitats, health risks from injuries, and the added effects of stress and injury that come with passing one or more dams.

    “The good news is that these effects can be reduced by installing or improving fish passage devices, modifying dam operations during peak migration periods, changing the structure of the dam to reduce injury and mortality, and by dam removal,” said Julie Nieland, a researcher at NEFSC‘s laboratory in Woods Hole, Mass. and lead author of the study.

    In the Penobscot River, the second largest river in New England, fish passage on the lower parts of the river has been helped by the removal of Great Works Dam in 2012 and Veazie Dam in 2013, and by building a natural river channel bypass around Howland Dam in 2015 as part of the Penobscot River Restoration Project. Access to habitat along the river and its tributaries has been improved for sea-run fish, including Atlantic salmon, American shad, river herring, striped bass, Atlantic sturgeon and shortnose sturgeon. In addition, increased survival standards for Atlantic salmon at many remaining dams have been implemented as part of the Federal Energy Regulatory Commission (FERC) licensing requirements.

    In 2014, more than 800 American shad and 180,000 river herring were counted by scientists at the newly-installed fish lift at the Milford Dam, the first mainstem dam on the system. Prior to 2014, there were no known American shad above Milford and very few river herring. Diadromous fish that survive passage at the Milford fish lift will emerge into historic spawning, nursery and rearing grounds that have not been accessible since the early 1900s.

    Passage at the remaining dams on the Penobscot River will be important to the recovery of diadromous fish populations. The model can be used to help estimate what passage rates are needed to avoid jeopardizing these populations.

    NOAA Fisheries researchers used the model to look at the impacts of 15 FERC-licensed hydroelectric dams in the Penobscot River watershed. Their results showed the number and location of dams affected adult salmon abundance, distribution, and the proportion of wild fish using various parts of the watershed.

    Salmon numbers increased as the number of hydroelectric dams decreased. Mainstem river dams had more impact than dams on tributaries. Salmon abundance also decreased as indirect mortality from effects of having to navigate past dams and up fish ladders or other passages increased. FERC is required to consult with NOAA Fisheries Service to ensure that continued dam operation does not impede recovery of Atlantic salmon.

    editorial@fis.comwww.fis.com
    http://fis.com/fis/worldnews/worldnews.asp?day=29&id=76832&l=e&monthyear=&ndb=1+target=&special=
     
  14. SpringVelocity

    SpringVelocity Well-Known Member

    There working on revitalization plan of the river in conjunction with net penning. SVIAC and first nations groups and community of Sooke are working on it...Pro fisher maybe could chime in I think he knows more on the status of it right now...
     
  15. agentaqua

    agentaqua Well-Known Member

  16. agentaqua

    agentaqua Well-Known Member

  17. Whole in the Water

    Whole in the Water Well-Known Member

    This is great news, I hope it will bring about the restoration of many other rivers and streams to support healthy salmon runs again.
     
  18. agentaqua

    agentaqua Well-Known Member

    Last edited: Apr 27, 2020
  19. agentaqua

    agentaqua Well-Known Member

    http://www.iflscience.com/environment/how-big-dams-are-poisoning-arctic-methylmercury

    How Dams Are Poisoning The Arctic

    September 8, 2015 | by Stephen Luntz

    Photo credit: Rigolet on the shores of Lake Melville's beauty could soon require a danger warning, as methylmercury could turn the environment toxic. Credit: Prentiss Balcom

    The build-up of the neurotoxin methylmercury in Arctic lakes has been a longstanding mystery. Now, a new study has helped explain this compound’s concentrations in some of the world's most fragile environments. In the process, it has sounded a warning about high-latitude large dams.

    Elemental mercury is poisonous enough, but its effects are most serious as methylmercury (CH3Hg+), since it crosses the blood-brain barrier. Unfortunately, methylmercury is building up at frightening rates in the high Arctic, with elephant seals concentrating the toxin in the most vulnerable coastal locations.

    While the source of this mercury is known – a combination of human emissions, primarily from burning coal and natural sources – ecologists have been bewildered why this mercury is being converted to its most toxic form, and not sinking safely to the ocean floor.

    So the announcement in the Proceedings of the National Academy of Sciences http://www.pnas.org/content/early/2015/09/02/1505541112 of an answer to this question is highly significant. The discovery was made as a result of an investigation into the impact of the Muskrat Falls hydroelectric dam on the estuarine fjord Lake Melville, and indicates there is a cost to such projects beyond what has previously been recognized.

    The dam is set to be finished by 2017. Much of the affected area will lie within the Inuit autonomous region of Nunatsiavut. After an unsuccessful effort to challenge the dam, Nunatsiavut’s government asked Harvard's Dr. Elsie Sunderland to investigate its potential effects, including the increase in methylmercury after a dam was built higher up the Churchill River, which feeds Lake Melville.

    Neither the federal nor provincial government considered Sunderland’s preliminary findings sufficient grounds to stop the dam, but her research has been scientifically fruitful. Moreover, with both administrations behind the dam up for election in the next three months, the timing of their release could prove electorally significant

    When Sunderland tested Lake Melville’s waters, she was astonished. "We found more methylmercury in the water than our modeling could explain," said Sunderland’s colleague Dr. Amina Schartup. "All of the methylmercury from the rivers feeding into Lake Melville and from the sediment at the bottom of the lake couldn't account for the levels in the water. There was something else going on here." The highest concentrations were 1 to 10 meters (3.3 to 33 feet) beneath the surface, a pattern also observed in the Arctic Ocean.

    Sunderland observed that this is the point where fluffy organic material gets trapped by strong salinity gradients, too buoyant to sink to the salty depths and yet too heavy to float to the surface. Zooplankton feeds on this material, concentrating any methylmercury in the process. "This system is incredibly efficient at accumulating methylmercury," said Schartup. Instead of mercury sinking to the seafloor, it builds up continuously, often to be consumed by fish that may then be caught for human consumption.

    Even more worryingly, Sunderland found that when soil from the area becomes saturated, it starts releasing huge quantities of methylmercury. If the dam is built, huge areas will be drowned and Sunderland fears the methylmercury released will make its way to Lake Melville, causing concentrations to skyrocket and endangering indigenous people dependent on food from the lake.
     
  20. Gunsmith

    Gunsmith Well-Known Member

    Hmmm! The clean power idealists would love to hide that fact.
     

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