# Relationship history for MSHA mine 4603491

Current hierarchy: **Hovetter Warren → Warren Mining Inc → No 1 Surface**

- 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:** Black Lode Coal Company Inc → No 1 Surface; 1950-01-01 to 1975-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Crestmont Oil & Gas Company → No 1 Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crestmont Oil & Gas Company → Black Lode Coal Company Inc; 1950-01-01 to 1975-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Hawthorne Mining Corp → No 1 Surface; 1975-02-07 to 1976-10-20; source msha-controller-operator-history
- **controller_controls_mine:** Dunleavy John P Et Al → No 1 Surface; 1975-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dunleavy John P Et Al → Hawthorne Mining Corp; 1975-02-07 to 1976-10-20; source msha-controller-operator-history
- **operator_operates_mine:** Black Lode Coal Company Inc → No 1 Surface; 1976-10-21 to 1979-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Crestmont Oil & Gas Company → Black Lode Coal Company Inc; 1976-10-21 to 1979-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Hovetter Warren → No 1 Surface; 1978-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Goode Contractors → No 1 Surface; 1979-05-21 to 1979-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Goode Gerald A & Michael A → No 1 Surface; 1979-05-21 to 1979-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Goode Gerald A & Michael A → Goode Contractors; 1979-05-21 to 1979-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Warren Mining Inc → No 1 Surface; 1979-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hovetter Warren → Warren Mining Inc; 1979-08-13 to current/open; source msha-controller-operator-history