# Relationship history for MSHA mine 4500366

Current hierarchy: **Teck Resources Limited → Teck Washington Incorporated → Pend Oreille 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:** Pintlar Corp → Pend Oreille Mine; 1950-01-01 to 1989-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Gulf USA Corp → Pend Oreille Mine; 1950-01-01 to 1989-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Gulf USA Corp → Pintlar Corp; 1950-01-01 to 1989-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Teck Resources Limited → Pend Oreille Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Resource Finance Inc → Pend Oreille Mine; 1989-06-15 to 1996-08-25; source msha-controller-operator-history
- **controller_controls_mine:** RFC Resource Finance Corp → Pend Oreille Mine; 1989-06-15 to 1996-08-25; source msha-controller-operator-history
- **controller_controls_operator:** RFC Resource Finance Corp → Resource Finance Inc; 1989-06-15 to 1996-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Cominco American Inc → Pend Oreille Mine; 1996-08-26 to 2001-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Teck Resources Limited → Cominco American Inc; 1996-08-26 to 2001-09-24; source msha-controller-operator-history
- **operator_operates_mine:** Teck Cominco American Inc → Pend Oreille Mine; 2001-09-25 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Teck Resources Limited → Pend Oreille Mine; 2001-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Teck Resources Limited → Teck Cominco American Inc; 2001-09-25 to 2007-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Teck Washington Incorporated → Pend Oreille Mine; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Teck Resources Limited → Pend Oreille Mine; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Teck Resources Limited → Teck Washington Incorporated; 2008-01-01 to current/open; source msha-controller-operator-history