# Relationship history for MSHA mine 1601339

Current hierarchy: **Effie  Dunaway → Gravel Supplies Inc → PLANT II**

- 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

- **controller_controls_mine:** Effie  Dunaway → PLANT II; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gravel Supplies Inc → PLANT II; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Effie  Dunaway → Gravel Supplies Inc; 1998-10-01 to current/open; source msha-controller-operator-history