Years of decay in Jewell and Tocaloma’s buildings and an invasion of ivy and blackberry since the park service purchased the land in 1972 have channeled a floodplain into a narrow creek. Coho salmon have struggled to swim upstream through rushing waters that can be like a “friggin’ river,” a SPAWN biologist said. David Briggs

The Department of Fish and Wildlife awarded four grants to Marin organizations this month totaling half a million dollars for salmon restoration projects. Turtle Island Restoration Network’s SPAWN program will improve a migration passage at Roy’s Pools by developing a more gradually elevated, navigable passage upstream.

Another SPAWN project will restore a floodplain west of . . .