# Relationship history for MSHA mine 0202042

Current hierarchy: **Worldwide Minerals Ltd → Worldwide Mineral Inc → Kell-Webb**

- 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:** Phoenix International Development Corp → Kell-Webb; 1981-05-01 to 1982-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Udell Lynn → Kell-Webb; 1981-05-01 to 1982-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Udell Lynn → Phoenix International Development Corp; 1981-05-01 to 1982-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Worldwide Mineral Inc → Kell-Webb; 1982-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Worldwide Minerals Ltd → Kell-Webb; 1982-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Worldwide Minerals Ltd → Worldwide Mineral Inc; 1982-07-12 to current/open; source msha-controller-operator-history