If you restore aquatic habitat in the Sacramento-San Joaquin Delta, will the fish come back? That’s the basic question behind a major restoration project planned at Prospect Island, a 1,600-acre (650-hectare) tract of levee-protected farmland near Rio Vista that is now owned by the state. The California Department of Water Resources and Department of Fish and Wildlife plan to breach the levees to restore tidal flow to the island, and reshape the terrain to create the kind of shallow habitat that could attract Chinook salmon and delta smelt. The agencies recently released a draft environmental impact report on their project.