# Relationship history for MSHA mine 4201931

Current hierarchy: **Stephen E Flechner → North Lily Mining Company → SILVER CITY**

- 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:** Claude K  Lee → SILVER CITY; 1981-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lee Mining Corp → SILVER CITY; 1985-03-01 to 1987-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Claude K  Lee → Lee Mining Corp; 1985-03-01 to 1987-09-20; source msha-controller-operator-history
- **operator_operates_mine:** North Lily Mining Company → SILVER CITY; 1987-09-21 to 1994-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Anton  Hendriksz → SILVER CITY; 1987-09-21 to 1994-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Anton  Hendriksz → North Lily Mining Company; 1987-09-21 to 1994-11-08; source msha-controller-operator-history
- **operator_operates_mine:** North Lily Mining Company → SILVER CITY; 1994-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen E Flechner → SILVER CITY; 1994-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen E Flechner → North Lily Mining Company; 1994-11-09 to current/open; source msha-controller-operator-history