# Relationship history for MSHA mine 4702718

Current hierarchy: **Madson Raymond → Raymond Madson Excavating → Barron County Operations**

- 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:** Madson Raymond → Barron County Operations; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Raymond Madson Excavating → Barron County Operations; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Madson Raymond → Raymond Madson Excavating; 1981-05-01 to current/open; source msha-controller-operator-history