Ted Walsh and Kirsten Hugger, field biologists for the NH Department of Environmental Services, collect samples on the Mascoma River on Thursday, Sept. 28, 2023, in West Lebanon, N.H. The river is considered a trend site for the state and undergoes long-term monitoring. Some of the things they were collecting were macroinvertebrates, which help determine the biologic health of the river. (Valley News - Jennifer Hauck) Copyright Valley News. May not be reprinted or used online without permission. Send requests to permission@vnews.com. VALLEY NEWS — Jennifer Hauck