The Challenge
Chelan PUD needed to comply with Federal Energy Regulatory Commission licensing and Clean Water Act Section 401 certification for the Lake Chelan Dam hydroelectric project. The challenge involved improving habitat conditions in the Chelan River, evaluating its potential for salmon spawning, and meeting strict regulatory requirements. This required synthesizing a decade of fisheries and water quality data while coordinating with multiple agencies and stakeholders.
Our Solution
Spheros Environmental (formerly Four Peaks Environmental) provided technical and regulatory support, starting with evaluating feasible options for temperature improvements. We analyzed modeled and observed habitat data to interpret fish habitat use and operational impacts. Our team synthesized biological and water quality studies, supported stakeholder meetings, and prepared the Biological Objectives Status Report (BOSR). This comprehensive report was reviewed and approved by federal, state, and tribal agencies, enabling compliance with licensing and certification requirements.
Results +What makes this unique
The BOSR became a cornerstone for Chelan PUD’s Use Attainability Analysis request, leading to Washington Department of Ecology’s first-ever use of this tool to propose a standard designation change. Our work ensured regulatory compliance and informed adaptive management strategies for long-term habitat improvement. Spheros Environmental continues to provide ongoing support for water quality compliance reviews, reinforcing our role in innovative, science-based regulatory solutions.
