# Relationship history for MSHA mine 1509916

Current hierarchy: **Sharon  Preece → Preece Energy 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Dunavant Enterprises Inc → No 1; 1975-06-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Valley Coal Corp → No 1; 1976-08-25 to 1978-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Dunavant Enterprises Inc → Coal Valley Coal Corp; 1976-08-25 to 1978-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Merit Coal Company Inc → No 1; 1978-05-23 to 1980-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Reynolds Billy Joe--P J Hurley & Charles Dixon → No 1; 1978-05-23 to 1981-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Reynolds Billy Joe--P J Hurley & Charles Dixon → Merit Coal Company Inc; 1978-05-23 to 1980-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Belfry Coal Company → No 1; 1980-06-11 to 1984-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Tipton Tom → No 1; 1980-06-11 to 1984-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Tipton Tom → Belfry Coal Company; 1980-06-11 to 1984-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Skeens  et al → No 1; 1981-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Old Dominion Energy Inc → No 1; 1984-02-03 to 1984-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Skeens  et al → Old Dominion Energy Inc; 1984-02-03 to 1984-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Skeens  et al → Old Dominion Energy Inc; 1984-02-03 to 1984-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Preece Energy Inc → No 1; 1984-10-11 to 1986-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Preece Homer & George → No 1; 1984-10-11 to 1986-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Preece Homer & George → Preece Energy Inc; 1984-10-11 to 1986-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Preece Energy Inc → No 1; 1986-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sharon  Preece et al → No 1; 1986-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sharon  Preece et al → Preece Energy Inc; 1986-01-16 to current/open; source msha-controller-operator-history