Topic

Fish Passage Program

The Matanuska-Susitna Borough Fish Passage Improvement Program is committed to restoring and enhancing aquatic connectivity across the region’s waterways. The program begins with the identification of fish-bearing streams, ensuring that priority is given to habitats critical for salmon and other native species. Comprehensive hydrological and hydraulic studies are conducted to understand water flow dynamics, seasonal variations, and structural impacts on fish movement. These assessments inform the design and construction of fish-friendly infrastructure such as culverts and bridges—that support natural migration patterns, improve stream health, and contribute to long-term ecological resilience. Through this integrated approach, the Borough advances both environmental stewardship and infrastructure sustainability.

In the Borough, 586 culverts have been surveyed regarding fish passage.

• 33% are likely to pass juvenile and adult salmon

• 62% may be some kind of salmon barrier

• 5% still need to be assessed