# Relationship history for MSHA mine 1513298

Current hierarchy: **Jackson Roy Dan → Dry Lake Coal Company Inc → B M R Mine 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

- **controller_controls_mine:** Jackson Roy Dan → B M R Mine No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B M R Coal Company Inc → B M R Mine No 1; 1982-01-01 to 1984-06-26; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin R.  Bennett → B M R Mine No 1; 1982-01-01 to 1984-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin R.  Bennett → B M R Coal Company Inc; 1982-01-01 to 1984-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Dry Lake Coal Company Inc → B M R Mine No 1; 1984-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Roy Dan → Dry Lake Coal Company Inc; 1984-06-27 to current/open; source msha-controller-operator-history