# Relationship history for MSHA mine 1517499

Current hierarchy: **Edward (Scotty)  Potter → Phelps Processing Inc → Mine No 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

- **controller_controls_mine:** Edward (Scotty)  Potter → Mine No 1; 1994-01-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Phelps Coal & Land Company → Mine No 1; 1994-02-01 to 1994-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Justice George → Mine No 1; 1994-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justice George → Phelps Coal & Land Company; 1994-02-01 to 1994-05-30; source msha-controller-operator-history
- **operator_operates_mine:** Phelps Processing Inc → Mine No 1; 1994-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward (Scotty)  Potter → Phelps Processing Inc; 1994-05-31 to current/open; source msha-controller-operator-history