# Relationship history for MSHA mine 3609255

Current hierarchy: **John D  Anderson → John Anderson Construction → John D Anderson**

- 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:** John Anderson Construction → John D Anderson; 2004-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John D  Anderson → John D Anderson; 2004-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John D  Anderson → John Anderson Construction; 2004-06-09 to current/open; source msha-controller-operator-history