# Relationship history for MSHA mine 3800527

Current hierarchy: **Laidlaw Industries Inc → Gsx Services Of S C Inc → Mingo 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:** Bennett Minerals Company → Mingo Mine; 1950-01-01 to 1978-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Bennett Minerals Company → Mingo Mine; 1950-01-01 to 1978-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Bennett Minerals Company → Bennett Minerals Company; 1950-01-01 to 1978-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Scat Inc → Mingo Mine; 1978-04-06 to 1985-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Sca Services Inc → Mingo Mine; 1978-04-06 to 1985-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Sca Services Inc → Scat Inc; 1978-04-06 to 1985-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Gsx Services Of S C Inc → Mingo Mine; 1985-03-29 to 1987-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Cimenteries Cbr Cementbedrijven → Mingo Mine; 1985-03-29 to 1987-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Cimenteries Cbr Cementbedrijven → Gsx Services Of S C Inc; 1985-03-29 to 1987-11-02; source msha-controller-operator-history
- **operator_operates_mine:** Gsx Services Of S C Inc → Mingo Mine; 1987-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Laidlaw Industries Inc → Mingo Mine; 1987-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laidlaw Industries Inc → Gsx Services Of S C Inc; 1987-11-03 to current/open; source msha-controller-operator-history