The Bureau of Reclamation had a significantly large project involving fish passage system positioned on the shoreline of Cle Elum reservoir. In 2022, they contracted with Pacific Netting Products (PNP) to build a debris boom to protect the fish passage structure from being damaged by floating debris. The boom allows the juvenile fish to pass through the structure and continue their migration downstream.
The purpose of the Cle Elum Debris Boom is to prevent large and small woody debris from entering the juvenile fish passage structure and allow fish to leave the reservoir and migrate downstream.
Problems to be addressed for successful Fish Passage
The project faced several challenges that required careful consideration and effective solutions. Among the primary issues were heavy winds and strong flow conditions, which demanded a robust design capable of withstanding such forces. Additionally, managing debris loads and ice posed significant operational complexities, particularly in ensuring the system’s durability and functionality throughout varying seasonal conditions. Another critical challenge was the reservoir’s significant pool fluctuations, with water levels varying by approximately 70 feet, necessitating a highly adaptable and reliable system.
In a nutshell, the main challenges included dealing with:
- Heavy winds and flow conditions
- Debris loads and ice management
- Significant pool fluctuations (approximately 70 feet)
Goals and expectations for the Cle Elum Debris Boom
The primary goals of the project focused on addressing key ecological and safety concerns. One objective was to prevent both large and small woody debris from entering the juvenile fish passage structure, ensuring its continued functionality and protection. Another critical goal was to facilitate the safe migration of fish, allowing them to leave the reservoir and continue their journey downstream. Additionally, the project prioritized public safety by implementing measures to safeguard individuals near the intake structure.
Primary goals of the project included:
- Preventing large and small woody debris from entering juvenile fish passage structure
- Allowing fish to leave reservoir and migrate downstream
- Ensuring public safety around the intake structure
- Works in various levels of pool elevation including shoreline and low pool elevation areas
- System has both continuous water and sandy areas
Watch the project video narrated by Michael Shaw, PNP Senior Director of Operations
Features and Specs
Key features included:
- 2,700 feet of 24-inch co-extruded orange HDPE boom
- Articulated sections with U-Link connections
- 4-foot debris skirt with rubber material
- Splash guard system
- Shore anchors and in-water anchors
Overall Project Satisfaction
The Bureau of Reclamation has expressed high satisfaction with the performance of the debris boom system installed at Cle Elum Reservoir. The system has proven highly effective in managing floating debris while allowing juvenile fish to safely continue their migration downstream. This innovative solution has played a critical role in safeguarding the fish passage structure from damage and ensuring its seamless operation.
The installation has not only demonstrated its value through exceptional debris management but also enhanced public safety and successfully protected fish passage, meeting critical ecological and operational goals. Additionally, PNP’s excellent customer support and service have further underscored the overall success and reliability of the project, leaving the Bureau of Reclamation with a positive perception of the system’s value and performance.
