# Relationship history for MSHA mine 2402202

Current hierarchy: **Joseph R  Bridgeford → Bridgeford Industries Inc → Kodiak 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bridgeford Construction → Kodiak Site; 2000-09-01 to 2008-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Joseph R  Bridgeford → Kodiak Site; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Bridgeford → Bridgeford Construction; 2000-09-01 to 2008-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Bridgeford Industries Inc → Kodiak Site; 2008-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph R  Bridgeford → Kodiak Site; 2008-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Bridgeford → Bridgeford Industries Inc; 2008-11-21 to current/open; source msha-controller-operator-history