# Relationship history for MSHA mine 4603122

Current hierarchy: **Ashland Inc → Mynu Coals Inc → No 8 Strip 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:** Mynu Coals Inc → No 8 Strip Mine; 1950-01-01 to 1977-04-30; source msha-controller-operator-history
- **controller_controls_mine:** F B  Nutter Sr → No 8 Strip Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** F B  Nutter Sr → Mynu Coals Inc; 1950-01-01 to 1977-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Mynu Coals Inc → No 8 Strip Mine; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → No 8 Strip Mine; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Mynu Coals Inc; 1977-05-01 to current/open; source msha-controller-operator-history