Catherine Creek provides habitat for ESA-listed Snake River spring Chinook, summer steelhead and Columbia River bull trout. The Catherine Creek Chinook population is considered one of the highest priority populations for restoration within the Grande Ronde Basin. \r\n\r\nCatherine Creek has been diverted at the Davis Dams since 1870 with the earliest water right. A variety of diversion structures have been in place in the past at both the Upper and Lower Davis Dams including gravel pushup dams. The project upgraded the two existing concrete diversions structures and install vertical slot fish ladders at each site.