# Relationship history for MSHA mine 4605706

Current hierarchy: **Workman Eddie C → Bredan Inc → No 1 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:** Chapmanville Construction Company Inc → No 1 Mine; 1978-01-01 to 1987-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Martely → No 1 Mine; 1978-01-01 to 1987-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Martely → Chapmanville Construction Company Inc; 1978-01-01 to 1987-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Thermo Inc → No 1 Mine; 1987-02-15 to 1987-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Workman Benjamin Et Al → No 1 Mine; 1987-02-15 to 1987-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Workman Benjamin Et Al → Thermo Inc; 1987-02-15 to 1987-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Thermo Inc → No 1 Mine; 1987-06-17 to 1988-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Kretzer Arthur → No 1 Mine; 1987-06-17 to 1988-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Kretzer Arthur → Thermo Inc; 1987-06-17 to 1988-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Bredan Inc → No 1 Mine; 1988-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Workman Eddie C → No 1 Mine; 1988-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Workman Eddie C → Bredan Inc; 1988-01-05 to current/open; source msha-controller-operator-history