# Relationship history for MSHA mine 1519099

Current hierarchy: **Bobby R  Elswich; Richard K  Potter → Beaver Mining Inc → Beaver Mining No 1**

- 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:** Beaver Mining Inc → Beaver Mining No 1; 2007-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard K  Potter  et al → Beaver Mining No 1; 2007-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard K  Potter  et al → Beaver Mining Inc; 2007-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby R  Elswich  et al → Beaver Mining Inc; 2007-04-10 to current/open; source msha-controller-operator-history