# Relationship history for MSHA mine 3503399

Current hierarchy: **Leamon Donald M → Karban Corp → Wood Street Distribution Site**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Leamon Donald M Et Al → Wood Street Distribution Site; 1981-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Karban Corp → Wood Street Distribution Site; 1993-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leamon Donald M Et Al → Karban Corp; 1993-09-01 to current/open; source msha-controller-operator-history