Chief Joseph Dam Fish Hatchery

Project Overview

The Chief Joseph Dam Fish Hatchery was a vital infrastructure initiative aimed at enhancing fish populations and restoring the ecological balance of the Columbia River system. Located near Bridgeport, Washington, the hatchery plays a crucial role in mitigating the impact of the Chief Joseph Dam on local salmon and steelhead species. PPM was selected to provide specialized marine construction services for the hatchery’s expansion and upgrade, supporting the sustainable management of aquatic life in the region.

Project Highlights

  • Clearing and preparing the site for new hatchery facilities, ensuring minimal disruption to the local environment.
  • Installing structural piles and foundations to support the new hatchery facilities, ensuring stability in challenging riverbank conditions.
  • Implementing best practices for water quality control and habitat preservation to maintain the sustainability of local fish populations.
  • Work included a 90-ft long pile support work trestle to support a 110-ton crane, excavation and concrete placement equipment.
  • The cofferdam included 85 pairs of 25 to 30-ft long sheet piles, two levels of internal bracing, and a structural tremie slab supported by tension rock anchors.
  • Assisted in design and built the pile supported work trestle for a braced cofferdam in the Columbia River just downstream of the Chief Joseph Dam.

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