# Relationship history for MSHA mine 1517590

Current hierarchy: **Roger D  Barnette → Last Gasp Coal Corp → Mine #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

- **controller_controls_mine:** Roger D  Barnette → Mine #2; 1994-04-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Last Gasp Coal Corp → Mine #2; 1994-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger D  Barnette → Last Gasp Coal Corp; 1994-09-01 to current/open; source msha-controller-operator-history