# Relationship history for MSHA mine 1515656

Current hierarchy: **Dawson Fred → Brandy Keg Coal Company Inc → No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Dawson Fred → No 1; 1984-04-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Steven Lee Enterprises → No 1; 1986-06-01 to 1987-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Dawson Fred → Steven Lee Enterprises; 1986-06-01 to 1987-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Collins Richard A → No 1; 1986-07-21 to 1989-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Hall Carlos → No 1; 1986-12-23 to 1989-12-07; source msha-controller-operator-history
- **operator_operates_mine:** Jean & Mary Coal Company Inc → No 1; 1987-03-03 to 1987-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Hall Carlos → Jean & Mary Coal Company Inc; 1987-03-03 to 1987-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Morning Sun Coal Company Inc → No 1; 1987-05-14 to 1987-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Collins Richard A → Morning Sun Coal Company Inc; 1987-05-14 to 1987-06-01; source msha-controller-operator-history
- **operator_operates_mine:** Brandy Keg Coal Company Inc → No 1; 1987-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dawson Fred → No 1; 1987-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dawson Fred → Brandy Keg Coal Company Inc; 1987-06-02 to current/open; source msha-controller-operator-history