# Relationship history for MSHA mine 1513159

Current hierarchy: **Crace Paris → Crace Elkhorn 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Doug  Hess et al → No 1; 1981-08-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ranchero Coal Company → No 1; 1981-10-01 to 1982-11-01; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Hess et al → Ranchero Coal Company; 1981-10-01 to 1982-11-01; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Martin  et al → Ranchero Coal Company; 1981-10-01 to 1982-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Thacker Coal Company → No 1; 1982-11-02 to 1983-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Thacker Ralph & Victor → No 1; 1982-11-02 to 1983-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Thacker Ralph & Victor → Thacker Coal Company; 1982-11-02 to 1983-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Four T Coal Company → No 1; 1983-04-06 to 1983-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Thacker Preston-Garred & Worley Taylor → No 1; 1983-04-06 to 1983-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Thacker Preston-Garred & Worley Taylor → Four T Coal Company; 1983-04-06 to 1983-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Southern Hills Coal Company → No 1; 1983-09-15 to 1985-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Mc Guire Mike → No 1; 1983-09-15 to 1985-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Mc Guire Mike → Southern Hills Coal Company; 1983-09-15 to 1985-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Stiltner Ralph → No 1; 1984-05-30 to 1985-09-04; source msha-controller-operator-history
- **operator_operates_mine:** S & B Energy Inc → No 1; 1985-02-05 to 1985-09-04; source msha-controller-operator-history
- **controller_controls_operator:** Stiltner Ralph → S & B Energy Inc; 1985-02-05 to 1985-09-04; source msha-controller-operator-history
- **operator_operates_mine:** B & L Mining → No 1; 1985-09-05 to 1985-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Lewis Henry & William Bays → No 1; 1985-09-05 to 1985-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Henry & William Bays → B & L Mining; 1985-09-05 to 1985-11-03; source msha-controller-operator-history
- **operator_operates_mine:** V & A Coal Company → No 1; 1985-11-04 to 1987-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Harvel Harvey Et Al → No 1; 1985-11-04 to 1987-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Harvel Harvey Et Al → V & A Coal Company; 1985-11-04 to 1987-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Crace Elkhorn Coal Company Inc → No 1; 1987-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crace Paris → No 1; 1987-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crace Paris → Crace Elkhorn Coal Company Inc; 1987-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert B  Hughes → No 1; 2004-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Hughes → S & B Energy Inc; 2004-09-10 to 1985-09-04; source msha-controller-operator-history