# Relationship history for MSHA mine 1514487

Current hierarchy: **Berwind Corporation → Kyber Coal Company Inc → G1**

- 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:** Viking Coal Company Inc → G1; 1984-03-01 to 1986-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Sullivan Darius L & James R → G1; 1984-03-01 to 1986-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan Darius L & James R → Viking Coal Company Inc; 1984-03-01 to 1986-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Dawson Fred → G1; 1984-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Berwind Corporation → G1; 1985-08-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Five Of Us Coal Company Inc → G1; 1986-07-25 to 1988-03-14; source msha-controller-operator-history
- **controller_controls_mine:** J D McDonald et al → G1; 1986-07-25 to 1988-03-14; source msha-controller-operator-history
- **controller_controls_operator:** J D McDonald et al → Five Of Us Coal Company Inc; 1986-07-25 to 1988-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Steven Lee Enterprises → G1; 1988-03-15 to 1989-11-28; source msha-controller-operator-history
- **controller_controls_operator:** Dawson Fred → Steven Lee Enterprises; 1988-03-15 to 1989-11-28; source msha-controller-operator-history
- **operator_operates_mine:** Regency Coal Company Inc → G1; 1989-11-29 to 1992-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Fife Clinas → G1; 1989-11-29 to 1992-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Fife Clinas → Regency Coal Company Inc; 1989-11-29 to 1992-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Kyber Coal Company Inc → G1; 1992-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Berwind Corporation → Kyber Coal Company Inc; 1992-03-31 to current/open; source msha-controller-operator-history