A fish ladder (foreground) helps migrating salmon bypass the Faraday Diversion Dam (also known as "Cazadero").
Rob Manning / OPB
The Clackamas River narrows as it approaches the century-old River Mill Dam.
A new fish ladder zig-zags (foreground) up the River Mill Dam to provide more gradual passage for migrating fish.
The calm waters of the Clackamas River just upriver of the River Mill Dam.
Signs at the River Mill Dam warn kayakers and boaters of the approaching spillway precipice.
PGE project manager for hydro licensing and water rights, John Esler, at a dam on the Clackamas River.
PGE biologist Tim Shibahara counts salmon that have come through the fish collector at the River Mill Dam.
Signs warn kayakers and boaters of the approaching River Mill Dam.
Portland General Electric fish biologist Garth Wyatt at the North Fork Dam.
A fish comes splashing into the observation tank, and PGE biologist Garth Wyatt checks if it's wild or hatchery.
Looking over PGE fish biologist Garth Wyatt's shoulder, as he determines if a fish is hatchery origin, or wild.
Monitor gives biologists a sneak peek of fish preparing to enter the fish sorting tanks.