# Relationship history for MSHA mine 4603362

Current hierarchy: **Edward A  Asbury → San-West Coal Company Inc → Havaco Load-Out**

- 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:** Mc Dowell Pocahontas Coal Company → Havaco Load-Out; 1950-01-01 to 1981-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Turley Joseph → Havaco Load-Out; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Turley Joseph → Mc Dowell Pocahontas Coal Company; 1950-01-01 to 1981-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Wyomac Coal Company → Havaco Load-Out; 1981-08-10 to 1991-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Havaco Load-Out; 1981-08-10 to 1991-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Wyomac Coal Company; 1981-08-10 to 1991-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Edward A  Asbury → Havaco Load-Out; 1984-12-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** San-West Coal Company Inc → Havaco Load-Out; 1991-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward A  Asbury → San-West Coal Company Inc; 1991-05-20 to current/open; source msha-controller-operator-history