Upper Klamath Lake

Water returning in February to Upper Klamath Lake, pictured here in a 2020 file photo, is among the lowest in 40 years of study by the Bureau of Reclamation.

Editor’s note: In July, the Bureau of Reclamation pledged $1.2 million to fund new scientific initiatives that will inform the agency’s management of the Klamath Project. This is the first in a series of articles explaining the past, present and future of that scientific research.

It’s the big question in the Upper Klamath Basin: To what extent does the water level of Upper Klamath Lake affect the health of sucker populations?