Cave spring is what a wet seep looks like when it grows to the size of a small river.
This karst (calcareous / limestone-type wet cave could serve as solid habitat for a variety of aquatic & cave species, but its easy access and high desirability among human visitors puts a lot of pressure on the species that might otherwise be abundant here.
One example is the onset in the past few decades of Whitenose Syndrome (geomyces destructans) among North American bats. The spores have jumped from cave to cave from Europe to the Northeastern USA and now here. Combining that with visitation pressure is a difficult bar for local bat populations to survive.
So, the USNPS has worked with the Cave Research Foundation to build in-place cave gates that fence out human visitors and allow bats & smaller through just fine.