# Relationship history for MSHA mine 3609077

Current hierarchy: **Bruce R  Stanton → Bruce R. Stanton Sole Proprietor → Stanton #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:** Bruce R. Stanton Sole Proprietor → Stanton #1; 2002-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruce R  Stanton → Stanton #1; 2002-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce R  Stanton → Bruce R. Stanton Sole Proprietor; 2002-05-01 to current/open; source msha-controller-operator-history