# Relationship history for MSHA mine 1510799

Current hierarchy: **Sterling  Tackett → Superior Valley Coals Inc → Hales No 1 & 2 Tipple**

- 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

- **operator_operates_mine:** Superior Valley Coals Inc → Hales No 1 & 2 Tipple; 1977-07-01 to 1984-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Conn Steven H → Hales No 1 & 2 Tipple; 1977-07-01 to 1984-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Conn Steven H → Superior Valley Coals Inc; 1977-07-01 to 1984-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Superior Valley Coals Inc → Hales No 1 & 2 Tipple; 1984-11-15 to 1987-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Justice Paul Dean → Hales No 1 & 2 Tipple; 1984-11-15 to 1987-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Justice Paul Dean → Superior Valley Coals Inc; 1984-11-15 to 1987-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Superior Valley Coals Inc → Hales No 1 & 2 Tipple; 1987-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sterling  Tackett → Hales No 1 & 2 Tipple; 1987-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sterling  Tackett → Superior Valley Coals Inc; 1987-08-11 to current/open; source msha-controller-operator-history