# Relationship history for MSHA mine 5100086

Current hierarchy: **Carl  Simons → Volcanite Limited → Volcanite**

- 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:** Volcanite Ltd → Volcanite; 1950-01-01 to 1987-02-26; source msha-controller-operator-history
- **controller_controls_mine:** Mc Clean James S → Volcanite; 1950-01-01 to 1987-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clean James S → Volcanite Ltd; 1950-01-01 to 1987-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Volcanite Limited → Volcanite; 1987-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Simons → Volcanite; 1987-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Simons → Volcanite Limited; 1987-02-27 to current/open; source msha-controller-operator-history