# Relationship history for MSHA mine 4801845

Current hierarchy: **Halliburton Company → Bentonite Performance Minerals LLC → BPM 76 Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Halliburton Company → BPM 76 Creek Mine; 1998-02-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bentonite Performance Minerals LLC → BPM 76 Creek Mine; 2021-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Halliburton Company → Bentonite Performance Minerals LLC; 2021-03-31 to current/open; source msha-controller-operator-history