My understanding is the bathhouse was destroyed (with dynamite) by the NPS in the 1950s.
Okay, explosively accelerated decay then. Anyway, this is in direct conflict with the NPS preservation mission and there is no way this building wasn't understood as historically significant to the regional history at the time they took it down. They did the same with almost all the ranch houses, actively preserving only Homer Wilson's place at Blue Creek. The Nail Ranch was allowed to decay as was Dodson's. The rest were destroyed.
I don't mind if they just let structures go to the elements as is happening to the above and at Terlingua Abaja, but I always think of their largely-well-hidden-from-public-knowledge destructive and incompatible stunts in many parks whenever I hear people gush over how great a preservation/management organization they are.