# Relationship history for MSHA mine 2301720

Current hierarchy: **Widel Raymond D → Ozark Mining Corp → Blackeagle Pit & Plant**

- 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:** Ozark Mining Corp → Blackeagle Pit & Plant; 1978-03-09 to 1981-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Mc Cauley Louis → Blackeagle Pit & Plant; 1978-03-09 to 1981-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cauley Louis → Ozark Mining Corp; 1978-03-09 to 1981-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Ozark Mining Corp → Blackeagle Pit & Plant; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Widel Raymond D → Blackeagle Pit & Plant; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Widel Raymond D → Ozark Mining Corp; 1981-06-01 to current/open; source msha-controller-operator-history