# Relationship history for MSHA mine 4605206

Current hierarchy: **Johnson James & Darrel R Young → Trojan Fuels Corp → No 5 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Gregoire Harold C → No 5 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gregoire Coals Inc → No 5 Mine; 1976-07-11 to 1980-10-07; source msha-controller-operator-history
- **controller_controls_operator:** Gregoire Harold C → Gregoire Coals Inc; 1976-07-11 to 1980-10-07; source msha-controller-operator-history
- **operator_operates_mine:** Trojan Fuels Corp → No 5 Mine; 1980-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnson James & Darrel R Young → No 5 Mine; 1980-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson James & Darrel R Young → Trojan Fuels Corp; 1980-10-08 to current/open; source msha-controller-operator-history