# Relationship history for MSHA mine 2601993

Current hierarchy: **Hardy Leslie → Hardy Property Maintenance → Janko No 2**

- 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:** H L M Company → Janko No 2; 1986-12-01 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Leavitt Gerald Et Al → Janko No 2; 1986-12-01 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Leavitt Gerald Et Al → H L M Company; 1986-12-01 to 1987-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Hardy Property Maintenance → Janko No 2; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hardy Leslie → Janko No 2; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hardy Leslie → Hardy Property Maintenance; 1987-10-01 to current/open; source msha-controller-operator-history