# Relationship history for MSHA mine 0503999

Current hierarchy: **Boldt James R → Abana Corp → Sinbad**

- 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:** Jemado Inc → Sinbad; 1984-11-01 to 1985-09-02; source msha-controller-operator-history
- **controller_controls_mine:** Nelson Donal O → Sinbad; 1984-11-01 to 1985-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Nelson Donal O → Jemado Inc; 1984-11-01 to 1985-09-02; source msha-controller-operator-history
- **operator_operates_mine:** Abana Corp → Sinbad; 1985-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boldt James R → Sinbad; 1985-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boldt James R → Abana Corp; 1985-09-03 to current/open; source msha-controller-operator-history