# Relationship history for MSHA mine 1515828

Current hierarchy: **Rose Michael → Rough Hill Coal Company → Rough Hill**

- 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:** Rose Michael Et Al → Rough Hill; 1986-10-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sun Coal Mining → Rough Hill; 1986-11-01 to 1987-04-16; source msha-controller-operator-history
- **controller_controls_mine:** Moses William R Et Al → Rough Hill; 1986-11-01 to 1987-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Moses William R Et Al → Sun Coal Mining; 1986-11-01 to 1987-04-16; source msha-controller-operator-history
- **operator_operates_mine:** Rena Coal Company → Rough Hill; 1987-04-17 to 1988-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Crawford Larry--Tom Hurst Et Al → Rough Hill; 1987-04-17 to 1988-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Larry--Tom Hurst Et Al → Rena Coal Company; 1987-04-17 to 1988-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Rough Hill Coal Company → Rough Hill; 1988-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rose Michael Et Al → Rough Hill Coal Company; 1988-01-17 to current/open; source msha-controller-operator-history