BOISE, Idaho (AP) — A utility’s survey indicates the population of white sturgeon fish in the Snake River between a dam on the Idaho-Oregon border and another in western Washington state is holding steady from 14 years ago.

North America’s largest freshwater fish, which dates to the dinosaurs, number about 4,000 in a 140-mile stretch of river between the dams. That tally counts fish measuring 2 ½ feet or longer.