# Relationship history for MSHA mine 1300372

Current hierarchy: **Wolfe C L → I C O Corp → Ico Osko #4 Strip**

- 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:** New Lanning Coal Co → Ico Osko #4 Strip; 1950-01-01 to 1974-04-30; source msha-controller-operator-history
- **controller_controls_mine:** New Lanning Coal Company → Ico Osko #4 Strip; 1950-01-01 to 1974-04-30; source msha-controller-operator-history
- **controller_controls_operator:** New Lanning Coal Company → New Lanning Coal Co; 1950-01-01 to 1974-04-30; source msha-controller-operator-history
- **operator_operates_mine:** I C O Corp → Ico Osko #4 Strip; 1974-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wolfe C L → Ico Osko #4 Strip; 1974-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wolfe C L → I C O Corp; 1974-05-01 to current/open; source msha-controller-operator-history