# Relationship history for MSHA mine 2401981

Current hierarchy: **Detton John → Detton Construction → Dc Lucky**

- 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:** Detton Construction → Dc Lucky; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Detton John → Dc Lucky; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Detton John → Detton Construction; 1992-09-01 to current/open; source msha-controller-operator-history