# Relationship history for MSHA mine 3200870

Current hierarchy: **William Mike  Reynolds → Westby Rock → CEC Jaw ML-3**

- 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:** Chad  Monson → CEC Jaw ML-3; 2008-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monson Corporation → CEC Jaw ML-3; 2010-08-25 to 2013-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Chad  Monson → Monson Corporation; 2010-08-25 to 2013-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Westby Rock → CEC Jaw ML-3; 2013-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William Mike  Reynolds → CEC Jaw ML-3; 2013-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William Mike  Reynolds → Westby Rock; 2013-03-07 to current/open; source msha-controller-operator-history