Dam removal is a tried-and-true method for reviving fish and wildlife populations, enhancing public safety, preserving cultural values, and reuniting people with their rivers.
How is a dam broken down?
- To reduce the effects on the downstream area, the dam's structure is carefully removed. The contractor typically begins at the far side of the dam and proceeds backwards toward his river access point to remove stone and concrete.
- There is a growing trend to demolish dams when the costs, such as the effects on the environment, public safety, and socio-cultural values, are greater than the advantages, such as hydropower, flood control, irrigation, or recreation, or when the dam is no longer necessary.
- By allowing water to flow freely, removing a dam enhances water quality. Normal sediment load, more dissolved oxygen, and lower oxygen concentrations are all possible with natural flows. The elimination of dams is also extremely beneficial to fish and invertebrate species.
- Monitoring data revealed that the form and texture of the river channel very slightly changed after the dams were removed, and the water quality was unaffected. This is probably because the dams had little effect on stream flow or sediment storage.
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