# Relationship history for MSHA mine 3101958

Current hierarchy: **Pacific Mine Search Ltd → Pacific Mine Search (Usa) Ltd → Howie**

- 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:** Teck Resources Limited → Howie; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jacoby & Company A & E → Howie; 1983-04-01 to 1984-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Jacoby Charles H → Howie; 1983-04-01 to 1984-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Jacoby Charles H → Jacoby & Company A & E; 1983-04-01 to 1984-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Cominco American Inc → Howie; 1984-06-26 to 1986-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Teck Resources Limited → Cominco American Inc; 1984-06-26 to 1986-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Mine Search (Usa) Ltd → Howie; 1986-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pacific Mine Search Ltd → Howie; 1986-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pacific Mine Search Ltd → Pacific Mine Search (Usa) Ltd; 1986-08-11 to current/open; source msha-controller-operator-history