Ava V. '26, Gisele N. '26, and Alexa F. ’26 (not photographed) are sampling water quality above and below a large network of beaver dams on the Poestenkill River as part of their STEAM 10 class. Their hypothesis is that a filtration effect from the beavers' handiwork may purify the water of chemicals and other pollutants downstream of the dams. In addition to collecting samples, they have placed trail cameras to track the activity around the main beaver lodge.