# Relationship history for MSHA mine 1202457

Current hierarchy: **Daniel  Balkema → West Plains Mining, LLC → Kentner Creek Underground**

- 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:** William A  Woodward → Kentner Creek Underground; 2007-04-17 to 2023-04-05; source msha-controller-operator-history
- **operator_operates_mine:** West Plains Mining, LLC → Kentner Creek Underground; 2012-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William A  Woodward → West Plains Mining, LLC; 2012-08-14 to 2023-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Daniel  Balkema → Kentner Creek Underground; 2023-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Balkema → West Plains Mining, LLC; 2023-04-06 to current/open; source msha-controller-operator-history