# Relationship history for MSHA mine 2302349

Current hierarchy: **Mike  Swearengin → American Rock & Concrete LLC → Buchanan Quarry**

- 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:** Branson Rock & Aggregate LLC → Buchanan Quarry; 2006-11-22 to 2009-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Steven S  Redford → Buchanan Quarry; 2006-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven S  Redford → Branson Rock & Aggregate LLC; 2006-11-22 to 2009-09-29; source msha-controller-operator-history
- **operator_operates_mine:** American Rock & Concrete LLC → Buchanan Quarry; 2009-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Swearengin et al → Buchanan Quarry; 2009-09-30 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Swearengin et al → American Rock & Concrete LLC; 2009-09-30 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Journagan et al → American Rock & Concrete LLC; 2009-09-30 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Dane  Braden et al → American Rock & Concrete LLC; 2009-09-30 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Swearengin → Buchanan Quarry; 2012-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Swearengin → American Rock & Concrete LLC; 2012-09-01 to current/open; source msha-controller-operator-history