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Crew members from SailGP prepare to install native aquatic plants in the Chicago River. (Friends of the Chicago River)

Members of the SailGP international yacht racing league have converged on Chicago for an upcoming competition, but before taking their catamarans onto Lake Michigan this weekend, the athletes piled into canoes and helped install native aquatic plants along the Chicago River's banks.

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Red swamp crayfish pulled from the Chicago River during May 15 cleanup. (Twitter / @Bates-Jefferys)

In its 30-year history, Friends of the Chicago River’s annual cleanup has evolved from a focus on litter to invasive species. An invasive crayfish pulled from the river over the weekend highlights the work to be done.

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Artist Ben Miller with his painting of the Chicago River, created on the Riverwalk, April 3, 2022. (Courtesy of Friends of the Chicago River)

Artist Ben Miller cast a portrait of the Chicago River using just fishing gear. Here’s the big reveal.

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Ben Miller, demonstrating his technique of fly cast painting. (The Rhythms of the River / Manabu Inada)

Artist Ben Miller uses a unique technique called fly cast painting. He’ll be demonstrating it Sunday on the Riverwalk as he creates a portrait of the Chicago River.

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Rush Street has proposed a Rivers Casino as part of the under-construction 78 development on vacant land between the South Loop and Chinatown along the Chicago River. (Provided)

If a casino is coming to the riverfront, publicly accessible open green space should be a priority, as well as considerations for wildlife habitat, environmental advocates say. And the buildings themselves should be held to the highest standards of sustainability and climate resiliency.

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The North Branch of the Chicago River, dyed a telltale green, March 13, 2022. (Provided)

Even with officials from several government entities keeping watch, someone dumped dye into the North Branch of the Chicago River, turning it bright St. Patrick's Day green over the weekend.

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Dyeing the Chicago River green has been a St. Paddy's tradition since the 1960s. (Chicago St. Patrick's Day Parade / Facebook)

Dyeing the Chicago River green on St. Patrick’s Day has been a tradition since the 1960s. But in 2020 and 2021, rogues extended the practice to a section of the North Branch, a bridge too far for environmentalists.

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Fish species diversity has been increasing in the Chicago River. (Shedd Aquarium)

Back in the 1980s, the number of fish species found in the Chicago River could be counted on a single hand. Today, that number is up to 60 species, an increase in diversity that can be directly attributed to a decrease in wastewater pollutants, according to a new study from the Shedd Aquarium.

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(WTTW News)

The U.S. Army Corps of Engineers has allocated $225.8 million to the Brandon Road Lock and Dam invasive carp barrier. The funds will complete the planning and engineering phase of the project.

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The American mink is equally at home on land or in the water. And despite its size, is not to be trifled with. (Jan Den Ouden / Pixabay)

The American mink is the poster critter for Chicago River Day, the annual cleanup hosted by Friends of the Chicago River that has volunteers fanning out from Lake County to Calumet to clear litter and trash from sites along the waterway. Here’s how to participate in Saturday’s event.

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Heavy rains can overwhelm Chicago's sewer system. (Roman Grac / Pixabay)

The past few springs, Chicago has notched record-breaking rainfall totals. All that water has to go somewhere, and when it overwhelms the city’s sewers, untreated wastewater winds up in the Chicago River.

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Headwaters of Bubbly Creek and the Racine Avenue Pump Station. (Courtesy of USGS)

Congress authorized a plan from the Army Corps of Engineers to restore the Chicago River’s South Fork, a 1.25-mile stretch more familiarly known as Bubbly Creek. Now actual dollars need to follow. 

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Floating habitat being positioned on the Chicago River. (Shedd Aquarium / Brenna Hernandez)

Rafts loaded with plants floated down the Chicago River last week, a strange sight that in decades past might have been the result of some sort of bizarre garbage spill but these days is a sure sign of the waterway’s ongoing “re-wilding.”

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The DuSable Bridge (Marcin Wichary / Flickr)

The bridge, which spans the Chicago River at Michigan Avenue, paved the way for development of Chicago’s Magnificent Mile. Tune in at 7 p.m. Thursday to celebrate its past and present.

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Individual litter cleanup efforts will have to replace the Chicago River Day group event this year due to the coronavirus. (Courtesy Friends of the Chicago River)

The organization had to cancel its Chicago River Day cleanup due to the coronavirus. Instead of bringing thousands of volunteers together for a one-day event, the new Summer Challenge encourages people to pick up litter in their neighborhoods.

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Wet weather means it's time to minimize water entering the city's combined sewer system. (Vivek Jena / Flickr)

We’ve had a string of wet days, which stresses Chicago's combined sewer system. Here are conservation tips to minimize the chance of an overflow.