# Relationship history for MSHA mine 4406717

Current hierarchy: **Bill R  Simmons; Jack L  Simmons → Covenant Coal Corp → Jawbone #2**

- 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:** Bill R  Simmons et al → Jawbone #2; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Covenant Coal Corp → Jawbone #2; 1992-10-01 to 1993-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Bill R  Simmons et al → Covenant Coal Corp; 1992-10-01 to 1993-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Simmons et al → Covenant Coal Corp; 1992-10-01 to 1993-03-11; source msha-controller-operator-history
- **operator_operates_mine:** Westfork Coal Corp → Jawbone #2; 1993-03-12 to 1993-11-09; source msha-controller-operator-history
- **controller_controls_mine:** Bill R  Simmons et al → Jawbone #2; 1993-03-12 to 1994-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Bill R  Simmons et al → Westfork Coal Corp; 1993-03-12 to 1993-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Indian Creek Coal Inc → Jawbone #2; 1993-11-10 to 1996-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Williams Paul E → Jawbone #2; 1993-11-10 to 1996-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Williams Paul E → Indian Creek Coal Inc; 1993-11-10 to 1996-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Covenant Coal Corp → Jawbone #2; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Simmons et al → Covenant Coal Corp; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill R  Simmons et al → Covenant Coal Corp; 1996-04-01 to current/open; source msha-controller-operator-history