# Relationship history for MSHA mine 3001840

Current hierarchy: **Town Of Montour Falls-NY → Town Of Montour → PORTABLE PLANT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Town Of Montour → PORTABLE PLANT; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Montour Falls-NY → PORTABLE PLANT; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Montour Falls-NY → Town Of Montour; 2001-05-01 to current/open; source msha-controller-operator-history