# Relationship history for MSHA mine 3502781

Current hierarchy: **Blair B Brundige → B & B Roads Inc → B & B Roads Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Brundige & Popken Trucking Inc → B & B Roads Inc; 1950-01-01 to 1987-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Howard  Popken  et al → B & B Roads Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Popken  et al → Brundige & Popken Trucking Inc; 1950-01-01 to 1987-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Brundige  et al → Brundige & Popken Trucking Inc; 1950-01-01 to 1987-08-03; source msha-controller-operator-history
- **operator_operates_mine:** B & B Roads Inc → B & B Roads Inc; 1987-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bert  Brundige → B & B Roads Inc; 1987-08-04 to 2023-05-02; source msha-controller-operator-history
- **controller_controls_operator:** Bert  Brundige → B & B Roads Inc; 1987-08-04 to 2023-05-02; source msha-controller-operator-history
- **controller_controls_mine:** Blair B Brundige → B & B Roads Inc; 2023-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blair B Brundige → B & B Roads Inc; 2023-05-03 to current/open; source msha-controller-operator-history