# Relationship history for MSHA mine 2902449

Current hierarchy: **(George) Todd  Poling → Todd Poling → Todd Poling**

- 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:** Todd Poling → Todd Poling; 2016-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** (George) Todd  Poling → Todd Poling; 2016-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (George) Todd  Poling → Todd Poling; 2016-01-20 to current/open; source msha-controller-operator-history