# Relationship history for MSHA mine 2300227

Current hierarchy: **Verrill Dave → World Plan Executive Counsel → Weiler Marble Mine**

- 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:** Weiler Marble Company Inc → Weiler Marble Mine; 1950-01-01 to 1981-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Weiler Herman → Weiler Marble Mine; 1950-01-01 to 1981-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Weiler Herman → Weiler Marble Company Inc; 1950-01-01 to 1981-11-30; source msha-controller-operator-history
- **operator_operates_mine:** World Plan Executive Counsel → Weiler Marble Mine; 1981-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Verrill Dave → Weiler Marble Mine; 1981-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Verrill Dave → World Plan Executive Counsel; 1981-12-01 to current/open; source msha-controller-operator-history