# Relationship history for MSHA mine 4607320

Current hierarchy: **Meador Eric Dean → Briarwood Energy Inc → Mudlick No 1 Mine**

- 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:** Westmoreland Coal Company → Mudlick No 1 Mine; 1984-12-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elk River Sewell Coal Company → Mudlick No 1 Mine; 1987-07-01 to 1988-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Elk River Sewell Coal Company; 1987-07-01 to 1988-05-26; source msha-controller-operator-history
- **operator_operates_mine:** Briarwood Energy Inc → Mudlick No 1 Mine; 1988-05-27 to 1991-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Meador Eric Dean → Mudlick No 1 Mine; 1988-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meador Eric Dean → Briarwood Energy Inc; 1988-05-27 to 1991-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Peaceful Valley Mining Inc → Mudlick No 1 Mine; 1991-04-15 to 1992-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Varner John → Mudlick No 1 Mine; 1991-04-15 to 1992-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Varner John → Peaceful Valley Mining Inc; 1991-04-15 to 1992-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Mallard Creek Coal Inc → Mudlick No 1 Mine; 1992-08-01 to 1993-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Michael → Mudlick No 1 Mine; 1992-08-01 to 1993-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Michael → Mallard Creek Coal Inc; 1992-08-01 to 1993-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Briarwood Energy Inc → Mudlick No 1 Mine; 1993-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meador Eric Dean → Briarwood Energy Inc; 1993-03-24 to current/open; source msha-controller-operator-history