# Relationship history for MSHA mine 2103400

Current hierarchy: **Joseph L  White; Gary  Wiese → Tri-County Aggregate, Inc. → 1400 Power Screener**

- 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

- **controller_controls_mine:** Joseph L  White et al → 1400 Power Screener; 2003-09-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-County Aggregate, Inc. → 1400 Power Screener; 2003-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph L  White et al → Tri-County Aggregate, Inc.; 2003-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Wiese et al → Tri-County Aggregate, Inc.; 2003-11-12 to current/open; source msha-controller-operator-history