Complex sentence: Much of the camp was destroyed by the extensive flooding of the West Branch Susquehanna River in 1936, but some traces remain as a reminder of the days of Camp S-75-PA.
Split into simpler sentences: Much of the camp was destroyed by the extensive flooding of the West Branch Susquehanna River in 1936. Most of the camp is gone, but some traces remain as a reminder of the days of Camp S-75-PA.