# Relationship history for MSHA mine 4406403

Current hierarchy: **Mack  Stiltner → Lucky J Coal Company → No 3**

- 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:** Wolford Michael A & Steve → No 3; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mack  Stiltner et al → No 3; 1983-07-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple W Coal Company Inc → No 3; 1987-08-01 to 1988-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Wolford Michael A & Steve → Triple W Coal Company Inc; 1987-08-01 to 1988-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Lucky J Coal Company → No 3; 1988-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mack  Stiltner et al → Lucky J Coal Company; 1988-01-05 to current/open; source msha-controller-operator-history