# Relationship history for MSHA mine 1516714

Current hierarchy: **Gray Dennis → Headache Coal Company Inc → No 2**

- 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:** Cutter Coal Company Inc → No 2; 1989-08-01 to 1991-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Miller Carl → No 2; 1989-08-01 to 1991-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Miller Carl → Cutter Coal Company Inc; 1989-08-01 to 1991-02-13; source msha-controller-operator-history
- **operator_operates_mine:** Mar-Mac Fuels Inc → No 2; 1991-02-14 to 1992-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Mc Creary Beverly & Bob Et Al → No 2; 1991-02-14 to 1992-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Mc Creary Beverly & Bob Et Al → Mar-Mac Fuels Inc; 1991-02-14 to 1992-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Gray Dennis → No 2; 1992-01-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Headache Coal Company Inc → No 2; 1992-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gray Dennis → Headache Coal Company Inc; 1992-04-14 to current/open; source msha-controller-operator-history