# Relationship history for MSHA mine 5002098

Current hierarchy: **Irene A  Anderson; Ralph S  Anderson → Anderson & Sons LLC → Anderson & Sons Mining**

- 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:** Ralph S  Anderson et al → Anderson & Sons Mining; 2014-07-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Anderson & Sons LLC → Anderson & Sons Mining; 2022-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ralph S  Anderson et al → Anderson & Sons LLC; 2022-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Irene A  Anderson et al → Anderson & Sons LLC; 2022-08-12 to current/open; source msha-controller-operator-history