Longest spiral staircase
- Who
- Pattiki Mine
- Where
- United States (Carmi,)
- When
- 1981
Longest spiral staircase
A spiral staircase installed in the White County Coal LLC, Pattiki Mine, Carmi, Illinois, USA by Systems Control in May 1981 measures 336m 1103ft deep with 1520 steps.
A spiral staircase installed in the White County Coal LLC, Pattiki Mine, Carmi, Illinois, USA by Systems Control in May 1981 measures 336m 1103ft deep with 1520 steps.