# Relationship history for MSHA mine 3401303

Current hierarchy: **Johnson Myatt B → Mylu Coal Company Inc → Warner 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

- **controller_controls_mine:** Turner Charles Richard-William Tom Turner Et Al → Warner No 1; 1980-10-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Turner Brothers Inc → Warner No 1; 1981-01-01 to 1984-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Turner Charles Richard-William Tom Turner Et Al → Turner Brothers Inc; 1981-01-01 to 1984-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Myatt B → Warner No 1; 1982-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mylu Coal Company Inc → Warner No 1; 1984-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Myatt B → Mylu Coal Company Inc; 1984-08-01 to current/open; source msha-controller-operator-history