# Relationship history for MSHA mine 3002486

Current hierarchy: **Town Of Harpersfield-NY → Town Of Harpersfield → Town Of Harpersfield Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Town Of Harpersfield → Town Of Harpersfield Pit; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Harpersfield-NY → Town Of Harpersfield Pit; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Harpersfield-NY → Town Of Harpersfield; 1980-03-01 to current/open; source msha-controller-operator-history