# Relationship history for MSHA mine 1513422

Current hierarchy: **Mullins Acie → Red Star Coal Company Inc → No 3 Surface 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

- **operator_operates_mine:** Highland Fuels → No 3 Surface Mine; 1982-03-01 to 1983-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Walters John & David W Robinson → No 3 Surface Mine; 1982-03-01 to 1983-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Walters John & David W Robinson → Highland Fuels; 1982-03-01 to 1983-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Acie → No 3 Surface Mine; 1982-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Star Coal Company Inc → No 3 Surface Mine; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Acie → Red Star Coal Company Inc; 1983-07-01 to current/open; source msha-controller-operator-history