From time to time the local health officials raised concerns about swimming in the Susan River. Take for example of an incident that occurred in 1945. In early June, Dr. J.W. Crever, Lassen County Public Health Officer issued a polio alert. By mid-August, Crever noted that there was a decline of people using Roosevelt Pool and an increase of the same in the public using Susan River. Crever stressed swimming at the pool was much safer than the Susan River. Shortly thereafter he declared the polio threat over and only one case reported.