# Relationship history for MSHA mine 3503578

Current hierarchy: **Eric M  Evenson → Evenson Logging Company → Upper Page 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:** Evenson Logging Company → Upper Page Creek; 2003-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eric M  Evenson → Upper Page Creek; 2003-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric M  Evenson → Evenson Logging Company; 2003-05-20 to current/open; source msha-controller-operator-history