# Relationship history for MSHA mine 3609227

Current hierarchy: **Scott B  Kimmel → Michael Coal Company → Elizabethville Operation**

- 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:** Scott B  Kimmel → Elizabethville Operation; 2001-12-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Michael Coal Company → Elizabethville Operation; 2004-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott B  Kimmel → Michael Coal Company; 2004-04-26 to current/open; source msha-controller-operator-history