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A waterfall at River Park in Chicago. (Courtesy One City Films)

At River Park on Chicago’s Northwest Side, a concrete dam standing 4 feet high is being prepped for removal. But it’s not just any dam – this happens to be the last waterfall within Chicago city limits.

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(Courtesy Shedd Aquarium)

Shedd Aquarium is rolling out several new outdoor programs this summer aimed at bringing Chicagoans closer to local waters and aquatic life.

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Chicago has seen 6 inches of rain in June, well above the historical average, according to data from the National Weather Service. (Chicago Tonight)

Chicago has seen 6 inches of rain in June, well above the historical average of about 2.5 inches, according to data from the National Weather Service.

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(Tom Harris Photography / Studio Gang)

A recently completed boathouse along the South Branch of the Chicago River got top honors this week from the nonprofit group Friends of the Chicago River.

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Lincoln Yards artist’s rendering (Courtesy Sterling Bay)

A former industrial corridor along the North Branch of the Chicago River could be turned in to the city’s newest entertainment district. Rock critic Jim DeRogatis sounds a warning.

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As the weather gets nicer, Chicagoans and tourists are expected to flock to an increasingly popular destination: the Chicago River and attractions along its main branch. But has it become too congested?

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The Chicago River at Fullerton Avenue

A trio of aldermen push for the city to develop a riverfront park along the North Branch of the Chicago River – but the mayor has other plans.

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(Erica Gunderson / Chicago Tonight)

Keeping the river clean is no easy task, particularly during the summer months when the river is bustling. We spend a morning with one of Chicago’s trash-scooping river skimmers. 

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(Richard Schneider / Flickr)

The mayor outlines major projects to expand recreation along the Chicago River. Why some aldermen say it’s not enough.

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Conservationists have installed five bat houses in Cook County since 2016 to provide safe maternity colonies where female bats can give birth and nurse their pups. (Courtesy Friends of the Chicago River)

Three years after they began installing bat houses along waterways in Cook County, conservationists are hoping the bats will start moving in this year.

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(Chicago Tonight file photo)

The Chicago River is cleaner today than it has been in generations, but “cleaner” is a relative term. One local advocacy group wants the city to aim for a trash-free river.

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 Flooding in Chicago's Albany Park neighborhood on April 18, 2013. (Center for Neighborhood Technology / Flickr)

A forecast of heavy rain, unseasonably warm temperatures and melting snow presents a flooding risk for Chicago. MWRD offers tips to prevent basement backups and reduce strain on local water systems. 

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Like the city that grew around it, the Chicago River is constantly changing. Get a preview of “The Chicago River Tour with Geoffrey Baer.”

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Flooding in Albany Park in April 2013 (Center for Neighborhood Technology / Flickr)

There are more soggy days ahead. Find out how you can help ease the burden on the Chicago River and reduce the risk of flooding.

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Hundreds of anglers participate in the #ChicagoFishes event Oct. 13 to celebrate decades of cleanup efforts to the Chicago River. (© Shedd Aquarium)

An American eel caught by a 5-year-old angler last week is possibly the first such eel ever recorded in the Chicago River, according to the Illinois Department of Natural Resources.

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Chicago’s sewer and deep tunnel system couldn’t handle this weekend’s rain, allowing untreated sewage and stormwater into Lake Michigan.