# Relationship history for MSHA mine 1511276

Current hierarchy: **Donna L  Johnson → Diamond Star Mining Inc → No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Regina Fuel Company → No 1; 1978-05-01 to 1980-01-28; source msha-controller-operator-history
- **controller_controls_mine:** Donald E  Ratliff et al → No 1; 1978-05-01 to 1980-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Donald E  Ratliff et al → Regina Fuel Company; 1978-05-01 to 1980-01-28; source msha-controller-operator-history
- **operator_operates_mine:** Church Coal Company Inc → No 1; 1980-01-29 to 1993-05-12; source msha-controller-operator-history
- **controller_controls_mine:** John P  Church → No 1; 1980-01-29 to 1993-05-12; source msha-controller-operator-history
- **controller_controls_operator:** John P  Church → Church Coal Company Inc; 1980-01-29 to 1993-05-12; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Coal Inc → No 1; 1993-05-13 to 1999-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Rowe → No 1; 1993-05-13 to 1999-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Rowe → Heritage Coal Inc; 1993-05-13 to 1999-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Diamond Star Mining Inc → No 1; 1999-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donna L  Johnson → No 1; 1999-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna L  Johnson → Diamond Star Mining Inc; 1999-08-27 to current/open; source msha-controller-operator-history