Rotary Screw Trap

The 2023 Rotary Screw Trap Open House has been postponed until late May. Stay tuned for updates. Smolt trapping using a rotary screw trap Napa RCD monitors steelhead and salmon populations by collecting data on the number of smolts migrating to the ocean each year.  A...

Napa River Fishes

The Napa River watershed provides a range of habitat types for fish–from the steep, cold, fast-moving waters in the mountain streams, to the flat, warm, salty and tidal waters of the esturary. Twelve native fish species can be found in the upper, nontidal...