# Relationship history for MSHA mine 3004104

Current hierarchy: **Tammy L  Deyo → WOODFALLS INDUSTRIES, LLC → METSO 2.8**

- 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:** Tammy L  Deyo → METSO 2.8; 2008-01-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Woodfalls Industries, LLC → METSO 2.8; 2022-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tammy L  Deyo → Woodfalls Industries, LLC; 2022-05-03 to current/open; source msha-controller-operator-history