# Relationship history for MSHA mine 3401384

Current hierarchy: **Williams Perry → Addielee Sand & Gravel #2 → Barron Creek**

- 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:** Underwood Gravel & Sand → Barron Creek; 1983-01-01 to 1985-09-02; source msha-controller-operator-history
- **controller_controls_mine:** Underwood Bill & Danny → Barron Creek; 1983-01-01 to 1985-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Underwood Bill & Danny → Underwood Gravel & Sand; 1983-01-01 to 1985-09-02; source msha-controller-operator-history
- **operator_operates_mine:** Addielee Sand & Gravel #2 → Barron Creek; 1985-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Williams Perry → Barron Creek; 1985-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Perry → Addielee Sand & Gravel #2; 1985-09-03 to current/open; source msha-controller-operator-history