# Relationship history for MSHA mine 1508636

Current hierarchy: **Parrott Rodney B → Rod Energy Corp → Daugherty No 2 Strip Mine**

- 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

- **controller_controls_mine:** Parrott Rodney B → Daugherty No 2 Strip Mine; 1975-06-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rod Energy Corp → Daugherty No 2 Strip Mine; 1975-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Parrott Rodney B → Rod Energy Corp; 1975-07-14 to current/open; source msha-controller-operator-history