Projects>Locke Creek Fish Passage


Confluence designed and constructed a fish ladder for Yellowstone cutthroat trout on Locke Creek, a tributary to the Yellowstone River near Livingston, Montana. The fish ladder was designed to allow fish to migrate over two irrigation diversion structures. The ladder was constructed as a step-pool channel using large boulders to create the steps and pools. The project has successfully increased the availability of spawning habitat for Yellowstone cutthroat trout and is estimated to have increased fry production by 500%, from 2000 to 10,000 fish. This translates to the recruitment of approximately 800 Yellowstone cutthroat trout to the Yellowstone River each year. Confluence provided conceptual designs and material specifications and quantities for permitting, as well as on-site construction management services to guide implementation of the designs. Confluence staff also procured and installed riparian vegetation along the fish ladder.

Locke Creek Fish Migration Barrier

Before: Fish migration barrier on Locke Creek

Locke Creek Fish Migration

After: A series of steps and pools that allows fish migration