# Relationship history for MSHA mine 3401370

Current hierarchy: **Robert L  Cummins → Mill Creek Material Company → Mill Creek Material Company**

- 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:** Rebel Granite Corp → Mill Creek Material Company; 1982-11-01 to 1984-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Rebel Granite Corp → Mill Creek Material Company; 1982-11-01 to 1984-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Rebel Granite Corp → Rebel Granite Corp; 1982-11-01 to 1984-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Mill Creek Material Company → Mill Creek Material Company; 1984-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Cummins → Mill Creek Material Company; 1984-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Cummins → Mill Creek Material Company; 1984-11-28 to current/open; source msha-controller-operator-history