# Relationship history for MSHA mine 4001827

Current hierarchy: **Potter James R & Margaret → First Scott Corp → No 2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Potter James R & Margaret → No 2; 1974-12-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** First Scott Corp → No 2; 1975-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potter James R & Margaret → First Scott Corp; 1975-09-09 to current/open; source msha-controller-operator-history