Dr. Reuben Keller, Elizabeth Berg warn of invasive species.

The McCormick Bridgehouse & Chicago River Museum's gear room shows the motors and counterweights at work.

The annual Big Jump was part of this celebration of Friends' 40 years.

Historian Patrick McBriarty is the author of many Chicago history books, including "Chicago River Bridges."

Crain's Chicago Business asked us: What should the environmental priorities be for Chicago's new mayor?

Collecting seeds from native plants for redistribution thanks to funding from the National Environmental Education Foundation.

The reasons behind “a new renaissance in water quality" and some challenges ahead.

Friends of the Chicago River and the North River Commission, with the support of REI and the Chicago Park District, is hosting a series of walking, paddling, and in stream wading surveys of the Chicago River corridor between River Park and Gompers Park.

“The Chicago River system and its bridges are at the heart of Chicago’s past, present, and future. As the river has improved, so has the popularity of the museum."

"Generations of Chicagoans now value the Chicago River system as an invaluable natural resource," said Rep. Mike Quigley.