# Relationship history for MSHA mine 2901793

Current hierarchy: **Barite Ltd → Barite Of America → B O A Palmer Park**

- 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:** Barite Ltd → B O A Palmer Park; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barite Of America → B O A Palmer Park; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barite Ltd → Barite Of America; 1980-01-01 to current/open; source msha-controller-operator-history