Coal Mining Company Said I Wasn't Aloud To Have My Shower Curtain Up In Shower Room. What Can I Do?

I work for a big-name coal mining company in Pennsylvania, and in the employee lockelocker room, we have 3 rooms for showers. In the one that I always use, I have a shower curtain for privacy and to keep the steam in in the colder months to keep it warm. Just the other day, someone from engineering took it down and placed it in the janitorial closet. I had already talked to human resources about it before, and they said it was perfectly fine for me to have a shower curtain. After I got it back from the janitorial closet, the guy from engineering said that "there was a chance it would cause mold to grow in the shower room." I asked him if I was allowed to have a little bit of privacy in the shower, and he said, "You are. You're just not allowed to have a shower curtain. " After I got it back from him, I put it back up. Flash forward to Monday, I had to leave early and have a meeting with the assistant superintendent and the mining engineer. The assistant superintendent was taking the mine engineers side and told me when I put it back up, it was like I was telling the mine engineer to go fuck himself. He also told me if I wasn't comfortable taking a shower here, then I should just go home and take a shower. Is there anything I can do to get my shower curtain back up?

EDIT: I was talking to the female employee who also works underground with us. She said that in her locker room, she has 2 shower curtains, and they haven't taken them down. Or, have said anything to her about mold growing