# Relationship history for MSHA mine 3101751

Current hierarchy: **Sellers Billy → Sellers Construction Company → Black Ankle #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:** Southern Stone Industries Inc → Black Ankle #1; 1950-01-01 to 1979-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Robert G  Hughes → Black Ankle #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert G  Hughes → Southern Stone Industries Inc; 1950-01-01 to 1979-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Uwharrie Mining Company Inc → Black Ankle #1; 1979-11-21 to 1980-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Packer Timmy → Black Ankle #1; 1979-11-21 to 1980-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Packer Timmy → Uwharrie Mining Company Inc; 1979-11-21 to 1980-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Sellers Construction Company → Black Ankle #1; 1980-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sellers Billy → Black Ankle #1; 1980-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sellers Billy → Sellers Construction Company; 1980-05-16 to current/open; source msha-controller-operator-history