# Relationship history for MSHA mine 3609689

Current hierarchy: **Kyle R  Rhoads; Jim  Burgess → Twin Banks Coal Co. → West Cameron 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

- **operator_operates_mine:** Twin Banks Coal Co. → West Cameron Operation; 2008-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Burgess et al → West Cameron Operation; 2008-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Burgess et al → Twin Banks Coal Co.; 2008-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kyle R  Rhoads et al → Twin Banks Coal Co.; 2008-12-05 to current/open; source msha-controller-operator-history