Use "up the river" in a sentence

1. Due to the steepness of the Chelan River canyon, anadromous fish were not able to migrate up the river to Lake Chelan even before the dam was built.

Aufgrund des starken Gefälles in der Schlucht des Chelan Rivers waren Wanderfische auch vor dem Bau des Staudammes nicht in der Lage, in den Lake Chelan zu gelangen.