# Relationship history for MSHA mine 2003000

Current hierarchy: **Barbara  Edwards → A & E Agg  Inc → Fyke Washed Sand & Gravel Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** A & E Agg  Inc → Fyke Washed Sand & Gravel Inc; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eula M  Fyke → Fyke Washed Sand & Gravel Inc; 1997-04-01 to 2018-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Eula M  Fyke → A & E Agg  Inc; 1997-04-01 to 2018-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Barbara  Edwards → Fyke Washed Sand & Gravel Inc; 2018-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara  Edwards → A & E Agg  Inc; 2018-01-16 to current/open; source msha-controller-operator-history