OSM maps the dam, Thirumoorthy village and temple separately. That prevents one rounded pin from standing for an entire landscape.
Sacred interpretation
Tradition connects the hill with Brahma, Vishnu and Shiva; present it as devotion, not geology.
The waterfall remains conditional
No reliable exact OSM waterfall object was found. Forest permission, rain and safety decide access.
A complete visit can stop below
The dam and temple can remain meaningful even when the falls are closed.