# Relationship history for MSHA mine 1513433

Current hierarchy: **Skeens Stanley → Blackrock Coal Company → 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:** Sullivan Darius L & James R → No 1; 1978-09-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sullivan Brothers Coal Company → No 1; 1982-04-01 to 1985-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan Darius L & James R → Sullivan Brothers Coal Company; 1982-04-01 to 1985-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Blackrock Coal Company → No 1; 1985-12-11 to 1986-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Skeens Stanley → No 1; 1985-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Skeens Stanley → Blackrock Coal Company; 1985-12-11 to 1986-04-30; source msha-controller-operator-history
- **operator_operates_mine:** J N J Coal Company Inc → No 1; 1986-05-01 to 1987-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Sullivan Mary Charlene → No 1; 1986-05-01 to 1987-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan Mary Charlene → J N J Coal Company Inc; 1986-05-01 to 1987-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Blackrock Coal Company → No 1; 1987-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Skeens Stanley → Blackrock Coal Company; 1987-01-21 to current/open; source msha-controller-operator-history