Longest Full Exclusion Net in the World
Built in 2002 to reduce passage of fish through generation units at the largest pumped storage facility in the US. This massive net is the largest barrier net in the world. During the generation and pumping period, over 2 billion cubic ft. of water per hour flow through it. The ocean conditions, rolling surf and winds and high water flow velocity present many unique challenges. To meet those challenges, PNP designed a Netfloat Pressure Release System to reduce load during high water flow velocity or inclement weather while still maintaining the net’s shape, position and effectiveness. For this critical installation, the owner chooses to keep a redundant back up net on site. Due to weather and ice, this net is seasonally deployed, continuously cleaned during deployment, and replace 20% of net annually to maintain effectiveness.