Carnetta Galvin and Melody Homesly stood on Galvin’s porch holding glasses of wine on an August evening. It was Galvin’s birthday, and the best friends’ laughter reverberated from their corner of the brick apartment and into the streets of the Darbo-Worthington neighborhood in Madison, Wisconsin.

Across the street, tall grass surrounded a stagnant body of water that runs parallel to Galvin’s apartment building before fading into the distance beneath bridges and busy streets. That’s Starkweather Creek, historically fed by springs that have since disappeared or dramatically weakened. East and west branches of the creek wander through northeast Madison — including through the diverse Darbo-Worthington and Truax neighborhoods — before emptying into Lake Monona.