# Relationship history for MSHA mine 0301365

Current hierarchy: **Thompson Bob → B & T Coal Enterprises → Marilyn #1 Coal Loading Facility**

- 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:** B & T Coal Enterprises → Marilyn #1 Coal Loading Facility; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thompson Bob → Marilyn #1 Coal Loading Facility; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thompson Bob → B & T Coal Enterprises; 1977-07-01 to current/open; source msha-controller-operator-history