# Relationship history for MSHA mine 3605974

Current hierarchy: **Thomas W A → Rockwood Energy & Mineral Corp → Remco #2**

- 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:** Ingram Clark R-George M & Gary C → Remco #2; 1975-09-02 to 1982-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Ingram Coal Company → Remco #2; 1976-03-10 to 1982-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Ingram Clark R-George M & Gary C → Ingram Coal Company; 1976-03-10 to 1982-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Ingram Coal Company → Remco #2; 1982-06-17 to 1984-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Israel H J → Remco #2; 1982-06-17 to 1984-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Israel H J → Ingram Coal Company; 1982-06-17 to 1984-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Rockwood Energy & Mineral Corp → Remco #2; 1984-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas W A → Remco #2; 1984-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas W A → Rockwood Energy & Mineral Corp; 1984-11-19 to current/open; source msha-controller-operator-history