# Relationship history for MSHA mine 4402301

Current hierarchy: **Harmon John V → Confederate Mining Inc → No 1 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Ison Coal Company → No 1 Strip; 1950-01-01 to 1974-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Ison W P → No 1 Strip; 1950-01-01 to 1982-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Ison W P → Ison Coal Company; 1950-01-01 to 1974-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Coal Resources Inc → No 1 Strip; 1974-12-15 to 1976-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Meadows Delmar R → No 1 Strip; 1974-12-15 to 1976-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Meadows Delmar R → Coal Resources Inc; 1974-12-15 to 1976-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Met Coal Company → No 1 Strip; 1976-08-16 to 1978-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Gulf + Western Industries Inc → No 1 Strip; 1976-08-16 to 1978-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Gulf + Western Industries Inc → Virginia Met Coal Company; 1976-08-16 to 1978-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Confederate Mining Inc → No 1 Strip; 1978-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harmon John V → No 1 Strip; 1978-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harmon John V → Confederate Mining Inc; 1978-04-18 to current/open; source msha-controller-operator-history