http://www.sltrib.com/home/4267539-155/dam-project-fills-american-fork-with

http://www.heraldextra.com/news/local/north/american-fork/monitoring-clean-up-plan-for-tibble-fork-sediment-spill-still/article_20f70fe9-f9b9-59ea-90ca-89cc55c750ac.html
These are links to articles that talk about a sediment spill in August 2016 that killed fish in the American Fork River. The sediment (which was accidentally spilled) was laden with heavy metals, and was part of a dam rehabilitation project upstream. As the fine grain sediment settled, in some places it made layers up to two feet thick on the bed. This situation is something that I hadn’t thought about before. Usually I associate sediment as innocuous to the environment, although it does have the negative effects when it is in excess of burying wetlands.  However, after reading the article I realize that fine grain materials suspended in the water in excess choked the fish

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