# Relationship history for MSHA mine 3600265

Current hierarchy: **Wmx Technologies Inc → Warner Company → Warner Co-Cedar Hollow Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Warner Company → Warner Co-Cedar Hollow Plant; 1950-01-01 to 1990-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Warner Company → Warner Co-Cedar Hollow Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Warner Company → Warner Company; 1950-01-01 to 1990-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Warner Company → Warner Co-Cedar Hollow Plant; 1990-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wmx Technologies Inc → Warner Co-Cedar Hollow Plant; 1990-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wmx Technologies Inc → Warner Company; 1990-07-20 to current/open; source msha-controller-operator-history