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COLORADO RIVER ECOSYSTEM CHANGES
In 2003, scientists targeted invasive fish in the Grand Canyon. By 2006, Rainbow Trout fell from 90% to less than 10% of the catchFor four consecutive years, scientists actively removed invasive fish species from the Colorado River. This strategic initiative led to a n...- In 2015, scientists released fluorescent dye into Florida’s Silver River: Here’s what they discoveredA 2015 University of Florida experiment used five gallons of fluorescent dye to track water movement through a 5.1-mile section of Florida’...
- In 2024, four dams were removed from an American river. Over 400 miles of Salmon habitat reopened. Scientists are now watching an ecosystem rebuilding itselfFour hydroelectric dams on the Klamath River were removed in 2024. This project opened over 400 miles of historic salmon habitat. Indigenou...
- In 2016, Colorado listed 67 miles of Timpas Creek as impaired for sulfate. 7 years later, local farmers helped delist 24 miles after BMPs restored drinking water qualityTimpas Creek's sulfate levels significantly decreased due to improved irrigation practices. Voluntary efforts by local producers focused on...
- In 1886, Gilman grew from a mining camp into a Colorado mining town; after contamination concerns in 1984, remaining residents were removed in 1985Nestled high in the Rockies, Gilman, Colorado, was abandoned due to severe mining contamination. Years of mining left the land marred by to...
- Grand Canyon flash flood kills two as search continues for missing hikerA powerful flash flood swept through Grand Canyon National Park over the weekend. Rescuers found the bodies of a Texas chiropractor and at ...
- In 2015, California EPMT discovered Japanese knotweed along Lagunitas Creek. 2 years later, treatment cut knotweed by 93% on National Park Service land, a major gain nowJapanese knotweed can spread quietly along waterways, making an early discovery especially valuable. In 2015, California’s Early Detection ...
- In 2006, Virginia flagged the Rapidan River for failing swimming standards. 18 years later, DEQ removed it from the impaired list after BMPs restored water qualityRapidan River water quality in Virginia has finally turned a corner after nearly two decades of concern. A section once flagged for failing...
- Grand Canyon flood: Warnings issued for Arizona, Utah and Colorado as flash flood leaves 1 dead, 15 missingA catastrophic flash flood hit the Grand Canyon in Arizona on Saturday, resulting in at least one fatality. Approximately fifteen individua...
- In 1869, Grand Canyon was named by legendary explorer Major John Wesley Powell, over 150 years later scientists are revealing details about when North America's iconic marvel landscape was created, disappearance of mystery lakeColorado River originates at La Poudre Pass in Rocky Mountain National Park in Colorado and runs about 1,450 miles (2,330 km). Scientists h...
- Grand Canyon shuts for tourists after flash flood knocks out sole water pipeline; 15 people missingA major flash flood at Grand Canyon swept debris into the Colorado River. This event damaged the park's sole water pipeline, forcing evacua...
- After Nepal, a powerful flash flood hits Grand Canyon in Arizona leaving about 15 people missing; footbridges, bunkhouses destroyed by mud and boulders: Watch videoA powerful flash flood tore through Arizona's Grand Canyon on August 29, sending mud, boulders and debris through Bright Angel Canyon. Abou...
- In 2018, Natasha Whetzel helped burn 20 acres at Delaware’s Hurley Tract to restore habitat. 10 weeks later, native purple love grass had spread extensively, transforming the site into habitats for birds and pollinatorsConservation work in southern Delaware is helping restore and protect important habitats within the Nanticoke River watershed. At Middlefor...
- In 1972, a 3,300-acre preservation effort began protecting the Elk River Chain of Lakes in Michigan. More than 50 years later, monitoring shows water quality remains healthyMore than half a century ago, a conservation effort in northern Michigan set out to protect an extraordinary network of waterways, and its ...
- An engineering mistake in 1905 accidentally created California’s largest lake — and it changed the desert foreverIn 1905, an engineering blunder redirected the Colorado River into a desert basin, unintentionally giving rise to California's Salton Sea. ...
- In 2002, Shattuck Chemical agreed to pay $1.25 million for restoration of South Platte River following years of chemical release. 10 years later, the river was restored for migratory birds and native speciesHazardous substances near Shattuck Chemical Company prompted a settlement for restoration projects. Funds supported habitat improvements al...
- Till 1930, it was a thriving town near Las Vegas. Then it got drowned. Decades later, its streets and homes keep reappearingThe historic town of St. Thomas in Las Vegas submerged beneath a dam for decades, has resurfaced due to ongoing drought conditions. Once a ...
- In 1992, Congress authorized the removal of 2 dams that had blocked salmon for a century. 24 years later, the Elwha River once again flowed freely from the Olympic Mountains to the seaElwha River Restoration changed one of America’s most remarkable river recovery stories. Two dams once blocked salmon from reaching upstrea...
- In 2024, managers deliberately cooled the Colorado River to protect the Grand Canyon from invasive smallmouth bass. 2 years later, no bass recruitment had been detected, but the effort cost $19.1 million in replacement powerManagers at Glen Canyon Dam used an unusual strategy to protect native Colorado River fish from invasive smallmouth bass: they deliberately...
- In 1963, federal engineers completed Glen Canyon Dam in Arizona for water storage and power, which turned the Colorado River colder and disrupted native fish reproductionGlen Canyon Dam altered the Colorado River's temperature and flow significantly. This change negatively affected the endangered humpback ch...
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