# Relationship history for MSHA mine 4003062

Current hierarchy: **Asbury Charles M → Key Mining Inc → #6**

- 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

- **controller_controls_mine:** Asbury Charles M → #6; 1991-06-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Key Mining Inc → #6; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Charles M → Key Mining Inc; 1992-06-01 to current/open; source msha-controller-operator-history