Jamie Powell

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Jamie Powell
rainbow trout in water
Jamie Powell

PMDs on the Henry’s Fork

PMDs were one of the hot topics on the Henry’s Fork in 2024, so here’s a few excerpts from the 10 Year Insect Report just published, specifically about this insect. Total numbers Abundance of PMDs on the Henry’s Fork ranged from 365 individuals/m2 at St. Anthony in 2017 to 30,511 at Flat Rock in 2016, with an average of 7,701 individuals/m2 over all sites and years. Another way of looking at PMD abundance is that it has ranged from 2% to 61% of the total invertebrate community, with an average of 21%. For reference, data from the Bighorn River show that PMDs are typically 4% or less of all individuals. Change over time PMD abundance has been systematically decreasing across the watershed for the past decade, driven primarily by a large decrease at Flat Rock and to a lesser degree by a modest decline at St. Anthony. Our data show no evidence of systematic trends in PMD abundance one way or the other at Last Chance, Osborne, or Marysville. We know that doesn’t necessarily reflect hatches experienced by anglers, but it is what the data is telling us. More on that below. Insects Overall By any measure, the aquatic invertebrate community

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Jamie Powell

A River That Connects Generations

Steven and Jesse Lowe In times of uncertainty, we often turn to the natural world for solace. For many of us, the Henry’s Fork provides not just a place of beauty, but a profound sense of hope, connection, and peace. For families like the Lowe family, the Henry’s Fork is more than a river—it’s a thread that ties four generations together. From great-grandfather “Doc” driving to the river in his Model A during the Great Depression to great-grandsons experiencing the river for the first time in the 21st century, the Henry’s Fork has been a spiritual touchstone and a gathering place for generations past and future. As we face the challenges of rising temperatures and recurring droughts in the West, the Henry’s Fork needs our help now more than ever. That’s why the Henry’s Fork Foundation is launching the ambitious DIRTT Plan—a bold initiative designed to safeguard this cherished river for years to come. A key component of the DIRTT Plan is improving oxygen levels in Island Park Reservoir and the river downstream, which is vital for the survival of both trout and insects. By enhancing aeration at the dam and introducing additional oxygen into the reservoir, we could increase

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