# Relationship history for MSHA mine 2902510

Current hierarchy: **Perry  Allred; Leon  Scarlet → Buffalo Sand LP → Buffalo Sand**

- 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:** Buffalo Sand LP → Buffalo Sand; 2019-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Perry  Allred et al → Buffalo Sand; 2019-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry  Allred et al → Buffalo Sand LP; 2019-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leon  Scarlet et al → Buffalo Sand LP; 2019-06-14 to current/open; source msha-controller-operator-history