# Relationship history for MSHA mine 2601828

Current hierarchy: **Sagin James W G → Mks Inc → Oest 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:** Oest Inc → Oest Mine; 1983-01-01 to 1986-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Hines Thomas K Et Al → Oest Mine; 1983-01-01 to 1986-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Hines Thomas K Et Al → Oest Inc; 1983-01-01 to 1986-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Mks Inc → Oest Mine; 1986-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sagin James W G → Oest Mine; 1986-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sagin James W G → Mks Inc; 1986-02-24 to current/open; source msha-controller-operator-history