# Relationship history for MSHA mine 4406708

Current hierarchy: **Bill R  Simmons; Jack L  Simmons → Solus Coal Inc → Solus #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

- **operator_operates_mine:** Premier Mining Inc → Solus #1; 1992-08-01 to 1992-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Bill R  Simmons et al → Solus #1; 1992-08-01 to 1992-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Bill R  Simmons et al → Premier Mining Inc; 1992-08-01 to 1992-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Black Chariot Coal Company Inc → Solus #1; 1992-09-22 to 1994-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Wolford → Solus #1; 1992-09-22 to 1994-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Wolford → Black Chariot Coal Company Inc; 1992-09-22 to 1994-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Solus Coal Inc → Solus #1; 1994-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bill R  Simmons et al → Solus #1; 1994-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill R  Simmons et al → Solus Coal Inc; 1994-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Simmons et al → Solus Coal Inc; 1994-08-25 to current/open; source msha-controller-operator-history