"In addition, at the time of research, there are five states (Alabama, Maryland, Rhode Island, Tennessee, Texas) and two provinces (Northwest Territories and Prince Edward Island) with only 1 resort remaining. Details of state/province/territory data can be seen in Table 2."
I found it hard to believe that Texas has a ski resort. I did some searching and I can't find any evidence that this is true.
RI and Alabama both have one. Seems easy enough to check.