# Relationship history for MSHA mine 1513217

Current hierarchy: **Cardinal Resources Inc → Cardinal Resources Inc → No 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:** Cardinal Resources Inc → No 2; 1978-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark Colin C Et Al → No 2; 1981-08-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Resources Inc → No 2; 1981-11-01 to 1982-05-02; source msha-controller-operator-history
- **controller_controls_operator:** Cardinal Resources Inc → Cardinal Resources Inc; 1981-11-01 to 1982-05-02; source msha-controller-operator-history
- **operator_operates_mine:** April Coal Company Inc → No 2; 1982-05-03 to 1982-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Clark Colin C Et Al → April Coal Company Inc; 1982-05-03 to 1982-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Resources Inc → No 2; 1982-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cardinal Resources Inc → Cardinal Resources Inc; 1982-06-21 to current/open; source msha-controller-operator-history