# Relationship history for MSHA mine 1517568

Current hierarchy: **Rose Michael → Megan Inc → #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:** Clark Edgar N → #2; 1990-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rose Michael Et Al → #2; 1992-09-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Serendipity Mining Inc → #2; 1994-07-01 to 1995-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Clark Edgar N → Serendipity Mining Inc; 1994-07-01 to 1995-09-05; source msha-controller-operator-history
- **operator_operates_mine:** Megan Inc → #2; 1995-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rose Michael Et Al → Megan Inc; 1995-09-06 to current/open; source msha-controller-operator-history