# Relationship history for MSHA mine 4605319

Current hierarchy: **Brandon  Nguyen; Michael  Turner → Ambush Mining Inc → Ambush No 2 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

- **controller_controls_mine:** Olga Coal Company → Ambush No 2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Olga Coal Company → Ambush No 2 Mine; 1976-12-01 to 1992-11-11; source msha-controller-operator-history
- **controller_controls_operator:** Olga Coal Company → Olga Coal Company; 1976-12-01 to 1992-11-11; source msha-controller-operator-history
- **operator_operates_mine:** West Virginia Properties Inc → Ambush No 2 Mine; 1992-11-12 to 2001-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Gene R Taylor → Ambush No 2 Mine; 1992-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gene R Taylor → West Virginia Properties Inc; 1992-11-12 to 2001-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Michael D  Turner  et al → Ambush No 2 Mine; 1999-03-01 to 2008-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Ambush Mining Inc → Ambush No 2 Mine; 2001-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D  Turner  et al → Ambush Mining Inc; 2001-06-20 to 2008-04-15; source msha-controller-operator-history
- **controller_controls_operator:** William  Haskins  et al → Ambush Mining Inc; 2001-06-20 to 2008-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Turner  et al → Ambush No 2 Mine; 2008-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Turner  et al → Ambush Mining Inc; 2008-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandon  Nguyen  et al → Ambush Mining Inc; 2008-04-16 to current/open; source msha-controller-operator-history