# Relationship history for MSHA mine 2602007

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Brunswick Canyon**

- 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:** Granite Construction Inc → Brunswick Canyon; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T E Bertagnolli → Brunswick Canyon; 1987-05-01 to 2019-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Tim E  Bertagnolli → Brunswick Canyon; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim E  Bertagnolli → T E Bertagnolli; 1987-05-01 to 2019-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Brunswick Canyon Materials LLC → Brunswick Canyon; 2019-02-11 to 2023-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Jeremy  Page et al → Brunswick Canyon; 2019-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeremy  Page et al → Brunswick Canyon Materials LLC; 2019-02-11 to 2023-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Rasich et al → Brunswick Canyon Materials LLC; 2019-02-11 to 2023-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Zack  Doane et al → Brunswick Canyon Materials LLC; 2019-02-11 to 2023-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Brunswick Canyon; 2023-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 2023-07-11 to current/open; source msha-controller-operator-history