# Relationship history for MSHA mine 1519123

Current hierarchy: **Steve  Singleton; Nick  Massini → Bristol Energy Group Inc → Dusty Fork**

- 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:** Hugh  Slatery  et al → Dusty Fork; 2006-09-22 to 2007-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Bristol Energy Group Inc → Dusty Fork; 2007-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hugh  Slatery  et al → Bristol Energy Group Inc; 2007-06-13 to 2007-06-12; source msha-controller-operator-history
- **controller_controls_operator:** John J  Stoeckinger  et al → Bristol Energy Group Inc; 2007-06-13 to 2007-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Nick  Massini  et al → Dusty Fork; 2007-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nick  Massini  et al → Bristol Energy Group Inc; 2007-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Singleton  et al → Bristol Energy Group Inc; 2007-06-13 to current/open; source msha-controller-operator-history