Yellowstone National Park’s geyser basins see constant shifts and changes. New features heat up while others cool down. This is a normal process in the geyser basins and is monitored using a range of advanced technologies, allowing the National Park Service to take action to mitigate the situation.
In the Upper Geyser Basin, a hot spring across the boardwalk from Scallop Spring (just across the bridge by Castle Geyser) has gradually expanded to the point where the heat from it now weakens the wood of the boardwalk above it. Other areas of hot ground have been detected nearby as well, and the decision was made to move the boardwalk away from this increasingly unstable ground.
