# Relationship history for MSHA mine 2301432

Current hierarchy: **North American Resources Inc → Renick Coal Inc → Renick Coal Mine**

- 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:** Columbia Coal Company → Renick Coal Mine; 1975-09-08 to 1976-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Columbia Coal Company → Renick Coal Mine; 1975-09-08 to 1976-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Columbia Coal Company → Columbia Coal Company; 1975-09-08 to 1976-05-16; source msha-controller-operator-history
- **controller_controls_mine:** American Industries & Resources Corp → Renick Coal Mine; 1975-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Universal Coal & Energy Division → Renick Coal Mine; 1976-05-17 to 1995-09-04; source msha-controller-operator-history
- **controller_controls_operator:** American Industries & Resources Corp → Universal Coal & Energy Division; 1976-05-17 to 1995-09-04; source msha-controller-operator-history
- **operator_operates_mine:** Renick Coal Inc → Renick Coal Mine; 1995-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** North American Resources Inc → Renick Coal Mine; 1995-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** North American Resources Inc → Renick Coal Inc; 1995-09-05 to current/open; source msha-controller-operator-history