# Relationship history for MSHA mine 4609639

Current hierarchy: **Brian  Romine; Joyce  Robinson; Tony  Price → J2BTB Land Development, LLC → Pound Mill Branch Surface 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** J2BTB Land Development, LLC → Pound Mill Branch Surface Mine; 2023-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tony  Price et al → Pound Mill Branch Surface Mine; 2023-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Price et al → J2BTB Land Development, LLC; 2023-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joyce  Robinson et al → J2BTB Land Development, LLC; 2023-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Romine et al → J2BTB Land Development, LLC; 2023-01-05 to current/open; source msha-controller-operator-history