# Relationship history for MSHA mine 4001800

Current hierarchy: **Cooley Darrell → M C Coal Company Inc → No 1 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

- **operator_operates_mine:** Trinity Resources Inc → No 1 Mine; 1975-07-10 to 1976-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Rose R E → No 1 Mine; 1975-07-10 to 1976-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Rose R E → Trinity Resources Inc; 1975-07-10 to 1976-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Victory Resources Inc → No 1 Mine; 1976-03-17 to 1977-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Kinney David → No 1 Mine; 1976-03-17 to 1977-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Kinney David → Victory Resources Inc; 1976-03-17 to 1977-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Cooley Darrell → No 1 Mine; 1977-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M C Coal Company Inc → No 1 Mine; 1977-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cooley Darrell → M C Coal Company Inc; 1977-04-05 to current/open; source msha-controller-operator-history