A mysterious sinkhole is marked with tape on the earth abutment next to Howard Hanson Dam. The depression was found after the reservoir was lowered after flooding in January 2009. This photo was taken in February of that year.
A mysterious sinkhole is marked with tape on the earth abutment next to Howard Hanson Dam. The depression was found after the reservoir was lowered after flooding in January 2009. This photo was taken in February of that year. The Olympian
A mysterious sinkhole is marked with tape on the earth abutment next to Howard Hanson Dam. The depression was found after the reservoir was lowered after flooding in January 2009. This photo was taken in February of that year. The Olympian

Hanson Dam's mysteries solved

April 27, 2011 12:00 AM