# Relationship history for MSHA mine 2400686

Current hierarchy: **Thomas  Wynecoop → Midnite Mines Inc → Polaris Mine**

- 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

- **operator_operates_mine:** Carl Brown Mining → Polaris Mine; 1950-01-01 to 1981-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Brown Carl → Polaris Mine; 1950-01-01 to 1981-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Brown Carl → Carl Brown Mining; 1950-01-01 to 1981-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Midnite Mines Inc → Polaris Mine; 1981-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Wynecoop → Polaris Mine; 1981-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Wynecoop → Midnite Mines Inc; 1981-08-18 to current/open; source msha-controller-operator-history