# Relationship history for MSHA mine 4609509

Current hierarchy: **Brian  Vandevender → Brian Vandevender Contracting → Purdy Run 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:** Purdy Run Aggregates, LLC → Purdy Run Quarry; 2018-08-14 to 2020-12-07; source msha-controller-operator-history
- **controller_controls_mine:** John HW  Gefaell et al → Purdy Run Quarry; 2018-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John HW  Gefaell et al → Purdy Run Aggregates, LLC; 2018-08-14 to 2020-12-07; source msha-controller-operator-history
- **controller_controls_operator:** JP Todd  Karry et al → Purdy Run Aggregates, LLC; 2018-08-14 to 2020-12-07; source msha-controller-operator-history
- **operator_operates_mine:** Brian Vandevender Contracting → Purdy Run Quarry; 2020-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Vandevender → Purdy Run Quarry; 2020-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Vandevender → Brian Vandevender Contracting; 2020-12-08 to current/open; source msha-controller-operator-history