# Relationship history for MSHA mine 2301423

Current hierarchy: **Mayes Keith → Yates Energy & Development Company Inc → Yates Energy & Development No 1**

- 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:** Coal Creek Fuel Company → Yates Energy & Development No 1; 1950-01-01 to 1982-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Fray Glenn L → Yates Energy & Development No 1; 1950-01-01 to 1982-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Fray Glenn L → Coal Creek Fuel Company; 1950-01-01 to 1982-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Yates Energy & Development Company Inc → Yates Energy & Development No 1; 1982-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mayes Keith → Yates Energy & Development No 1; 1982-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mayes Keith → Yates Energy & Development Company Inc; 1982-05-20 to current/open; source msha-controller-operator-history