# Relationship history for MSHA mine 3003573

Current hierarchy: **Bruce F  Taylor → NORTHEAST  BLUESTONE LLC → WALTON #1**

- 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:** Northeast  Bluestone LLC → WALTON #1; 2007-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruce F  Taylor → WALTON #1; 2007-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce F  Taylor → Northeast  Bluestone LLC; 2007-02-01 to current/open; source msha-controller-operator-history