# Relationship history for MSHA mine 0102486

Current hierarchy: **Stanley Arthur T → Stanley Excavating Company Inc → Pit #6**

- 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

- **controller_controls_mine:** Stanley Arthur T → Pit #6; 1977-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stanley Excavating Company Inc → Pit #6; 1982-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley Arthur T → Stanley Excavating Company Inc; 1982-05-01 to current/open; source msha-controller-operator-history