# Relationship history for MSHA mine 1516963

Current hierarchy: **Eurmel  Hunter → Shelcha Coal Corp → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Biliter Marvin Jr → No 2; 1981-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Owens Jack → No 2; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eurmel  Hunter → No 2; 1985-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & Mb Coal Company → No 2; 1990-09-01 to 1992-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Biliter Marvin Jr → M & Mb Coal Company; 1990-09-01 to 1992-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Pa-Pa Coal Mining Company Inc → No 2; 1992-02-12 to 1992-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Owens Jack → Pa-Pa Coal Mining Company Inc; 1992-02-12 to 1992-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Shelcha Coal Corp → No 2; 1992-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eurmel  Hunter → Shelcha Coal Corp; 1992-06-22 to current/open; source msha-controller-operator-history