# Relationship history for MSHA mine 1514730

Current hierarchy: **Jackie  Hembree → Headache Coal Company Inc → Sugartree**

- 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:** Randal  Lawson → Sugartree; 1983-06-27 to 1985-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Terco Inc → Sugartree; 1984-07-01 to 1985-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Randal  Lawson → Terco Inc; 1984-07-01 to 1985-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Terry  McCreary et al → Sugartree; 1985-01-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Terco Inc → Sugartree; 1985-02-21 to 1989-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Terry  McCreary et al → Terco Inc; 1985-02-21 to 1989-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Richland Contracting Company → Sugartree; 1989-03-09 to 1989-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Lee  Congleton → Sugartree; 1989-03-09 to 1993-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Congleton → Richland Contracting Company; 1989-03-09 to 1989-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Sugartree Coal Company Inc → Sugartree; 1989-10-30 to 1991-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Richard C  Moore et al → Sugartree; 1989-10-30 to 1991-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Richard C  Moore et al → Sugartree Coal Company Inc; 1989-10-30 to 1991-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Barbara C Mining Inc → Sugartree; 1991-08-01 to 1995-02-20; source msha-controller-operator-history
- **controller_controls_mine:** John P  Inman → Sugartree; 1991-08-01 to 1995-02-20; source msha-controller-operator-history
- **controller_controls_operator:** John P  Inman → Barbara C Mining Inc; 1991-08-01 to 1995-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Stephen C  Skidmore → Sugartree; 1993-02-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Canfield Energy Inc → Sugartree; 1995-02-21 to 2000-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Stephen C  Skidmore → Canfield Energy Inc; 1995-02-21 to 2000-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Jackie  Hembree → Sugartree; 1997-02-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Headache Coal Company Inc → Sugartree; 2000-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackie  Hembree → Headache Coal Company Inc; 2000-02-23 to current/open; source msha-controller-operator-history