# Relationship history for MSHA mine 1503765

Current hierarchy: **Young E J → Maae Coal Company → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Young E J → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fugate & Young Coal Company → No 1 Mine; 1950-01-01 to 1976-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Fugate & Young Coal Company → No 1 Mine; 1950-01-01 to 1976-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Fugate & Young Coal Company → Fugate & Young Coal Company; 1950-01-01 to 1976-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Maae Coal Company → No 1 Mine; 1976-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Young E J → Maae Coal Company; 1976-10-01 to current/open; source msha-controller-operator-history