# Relationship history for MSHA mine 2302002

Current hierarchy: **North American Resources Inc → North American Resources Inc → Riedel Energy 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:** Riedel Energy Inc → Riedel Energy Mine; 1989-02-01 to 1992-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Riedel Industrial Waste Management → Riedel Energy Mine; 1989-02-01 to 1992-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Riedel Industrial Waste Management → Riedel Energy Inc; 1989-02-01 to 1992-10-25; source msha-controller-operator-history
- **operator_operates_mine:** North American Resources Inc → Riedel Energy Mine; 1992-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** North American Resources Inc → Riedel Energy Mine; 1992-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** North American Resources Inc → North American Resources Inc; 1992-10-26 to current/open; source msha-controller-operator-history