tv7-4.com Releasing sediment into the Pigeon River again!!! Killing fish Sediments pollute Pigeon River Dam released large amount of sediments Posted: Wednesday, June 25, 2008 at 6:13 p.m. PIGEON RIVER STATE FOREST -- Officials are keeping a close eye on the Pigeon River after fish have begun to pop up dead. Crews from the Department of Natural Resources and the Department of Environmental Quality spent Wednesday assessing water flow and the fish population. The DNR began to receive calls earlier this week about the changes occurring in the river. Monday we became aware of some flow irregularities on the Pigeon River, said David Brogeson, a fisheries supervisor with the DNR. There was a spike in flow and then a deep decline in the flow. Its believed an upstream dam on private property was fully opened allowing the release of a large amount of sediments. Those sediments then clouded the water and reduced the level of oxygen in the water. In the impoundment there's an accumulation of sediment that's accumulated over years and to have a lot of that released over a short amount of time, that causes problem for the stream, Brogeson said. There is not believed to be any risk to human health. Brogeson says the DNR and the DEQ will continue to monitor the river to determine the impact this will have on the rivers fish population.