# Relationship history for MSHA mine 3304647

Current hierarchy: **Dennis  Hendershot; Michael Thomas  Puskarich → Big Run Resources, Inc. → Big Run**

- 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:** Big Run Resources, Inc. → Big Run; 2011-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Hendershot et al → Big Run; 2011-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Hendershot et al → Big Run Resources, Inc.; 2011-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael Thomas  Puskarich et al → Big Run Resources, Inc.; 2011-08-31 to current/open; source msha-controller-operator-history