Dam and Fish conservation in Idaho

By Tran Mai Huong, from Vietnam.

I have a trip to Dworshak National Fish Hatchery. Dworshak National Fish Hatchery is located at the confluence of the North Fork and mainstem Clearwater River, Idaho. The hatchery was constructed to mitigate for the loss of steelhead trout in the North Fork of the Clearwater River and its tributaries as a result of the construction of Dworshak Dam.

On the one hand, the hatchery consists of an incubation area and early rearing room containing the rearing containers, two large outside raceway, and a collection basin. The satellite facility consists of a weir in the river, a fish ladder, the fish trap, two raceway holding ponds, and a fish spawning area.

Returning salmon are collect in large holding ponds and moved to the spawning room by mechanical crowder and lifts. Fish already to spawn are selected while those not ready are returned to the holding pond until a later date.

On the other hand, they cooperate with indigenous people. They partner with tribes to restore fish and their habitat and develop the fishing program.

They determine habitat needs for fish populations and identify where improvements can be made. Dams and other man-made barries threaten many fish populations. They work with others to provide water quality, quantity and fish passage needs in rivers and streams.

In Vietnam, hydropower has been causing vast social and environmental problems. Many of-of these problems have so far found no way out and been impacting on the human being and nature being. The dams cause the displacement of many communities, destroying their livelihoods. Downstream people also face many water-related issues; and trans- boundary impacts include flooding, water shortage, and water pollution. The dams destroy the river and forest ecology. Biodiversity of the river is damaged. The livelihood of fishermen and boat people was lost.


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