CULVER, OR -- A health advisory issued for Lake Billy Chinook has expanded. The Oregon Health Authority first issued the warning June 22, after a harmful algae bloom was discovered from the cove at Perry South Campground to the southern tip of Chinook Island. Now, the agency has confirmed the presence of harmful Cyanobacteria in the Metolius, Deschutes and Crooked River arms of Lake Billy Chinook. Click HERE to view the full advisory.