# Relationship history for MSHA mine 1002022

Current hierarchy: **Michael D  Bright → Bright Enterprises Inc → Brights Portable 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:** Bright Enterprises Inc → Brights Portable Plant; 2002-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael D  Bright → Brights Portable Plant; 2002-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D  Bright → Bright Enterprises Inc; 2002-03-20 to current/open; source msha-controller-operator-history