# Relationship history for MSHA mine 2402683

Current hierarchy: **Dean  Johnson; Gary  Wilson → Johnson-Wilson Constructors, Inc. → Parker Pit**

- 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:** Johnson-Wilson Constructors, Inc. → Parker Pit; 2014-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Johnson et al → Parker Pit; 2014-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Johnson et al → Johnson-Wilson Constructors, Inc.; 2014-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Wilson et al → Johnson-Wilson Constructors, Inc.; 2014-11-12 to current/open; source msha-controller-operator-history