# Relationship history for MSHA mine 4801710

Current hierarchy: **Mark D  Hettinger → Hettinger LLC → Cedar Rapids 6239**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hettinger LLC → Cedar Rapids 6239; 2007-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark D  Hettinger et al → Cedar Rapids 6239; 2007-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark D  Hettinger et al → Hettinger LLC; 2007-04-01 to current/open; source msha-controller-operator-history