# Relationship history for MSHA mine 1700916

Current hierarchy: **Janet G  Anderson → George Anderson & Sons, Inc. → Burnell Pit**

- 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:** George Anderson & Sons, Inc. → Burnell Pit; 2013-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Janet G  Anderson et al → Burnell Pit; 2013-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janet G  Anderson et al → George Anderson & Sons, Inc.; 2013-08-21 to current/open; source msha-controller-operator-history