# Relationship history for MSHA mine 1510847

Current hierarchy: **Turner Ernest A → Hellier Fuel Company → No 3**

- 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:** Reese Chester-Danny & Teddy D → No 3; 1977-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Branch Mining Company → No 3; 1977-10-01 to 1980-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Reese Chester-Danny & Teddy D → Big Branch Mining Company; 1977-10-01 to 1980-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Hylton Freddie A → No 3; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hellier Fuel Company → No 3; 1980-08-12 to 1985-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Hylton Freddie A → Hellier Fuel Company; 1980-08-12 to 1985-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Hellier Fuel Company → No 3; 1985-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Turner Ernest A → No 3; 1985-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Turner Ernest A → Hellier Fuel Company; 1985-10-15 to current/open; source msha-controller-operator-history