Two persistent problems at Johnstown Flood National Memorial are non-native plants that are invading the native plant communities and acidic, abandoned mine drainage that flows through the park. Non-native plants that are highly invasive and threaten the park's resources include exotic bush honeysuckles, giant knotweed and Japanese knotweed. Abandoned mine drainage that flows through the park originates upstream near the communities of Saint Michael and Beaverdale.
Did You Know?
People made Memory Jars from items collected among the ruins after the 1889 Flood. There is one such Memory Jar on display at the Johnstown Flood Museum.