# Relationship history for MSHA mine 1516664

Current hierarchy: **Noble James E → Apache Fuel → Mine 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:** Black Diamond Coal Company → Mine No 1; 1989-07-01 to 1990-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Polly Herman Et Al → Mine No 1; 1989-07-01 to 1995-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Polly Herman Et Al → Black Diamond Coal Company; 1989-07-01 to 1990-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Coal Company → Mine No 1; 1990-07-30 to 1992-10-06; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Gary → Mine No 1; 1990-07-30 to 1992-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Gary → Taylor Coal Company; 1990-07-30 to 1992-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Coal Company → Mine No 1; 1992-10-07 to 1995-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Polly Herman Et Al → Black Diamond Coal Company; 1992-10-07 to 1995-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Apache Fuel → Mine No 1; 1995-03-02 to 1995-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Howard Cecil → Mine No 1; 1995-03-02 to 1995-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Howard Cecil → Apache Fuel; 1995-03-02 to 1995-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Apache Fuel → Mine No 1; 1995-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Noble James E → Mine No 1; 1995-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Noble James E → Apache Fuel; 1995-07-07 to current/open; source msha-controller-operator-history