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Started by Woolly Bugger, May 02, 2020, 06:57:09 AM
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QuoteIn January, contributor Jon Hurdle reported on how a series of dams along the Brandywine that date back some 200 years were being targeted for removal or modification.The goal is to allow shad and more to return to their ancestral spawning grounds again for the first time in two centuries. This week, Jon Hurdle returns to tell us there's evidence the effort is paying off.
Quote from: JMiller on May 06, 2020, 12:45:45 PMYou know what's interesting on this topic. We've had it in our minds for so long, as fishermen, biologists, conservationists, that dams need to be removed to enhance biological conditions of our rivers in a number of ways.Recently at a conference I was at in PA, I heard an interesting alternative argument proposed. That actually, the water held behind some of these dams on rivers such as the allegheny, which would normally just flow through in undammed conditions, now serves as a cool water reserve function during the warm summer months, which has implications for helping imperiled native freshwater mussels and other species. Drought-like, hot summer low flow conditions are a threat to these species, and some of these reservoirs help to maintain acceptable flows. I don't propose this as a blanket argument against dam removal, just food for thought.