# Relationship history for MSHA mine 0301146

Current hierarchy: **Brandon  Robertson → Southeast Gravel Company → SMITH GRAVEL PIT**

- 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:** Southeast Gravel Company Inc → SMITH GRAVEL PIT; 1950-01-01 to 2026-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Teresa R Williams → SMITH GRAVEL PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Teresa R Williams → Southeast Gravel Company Inc; 1950-01-01 to 2026-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Southeast Gravel Company → SMITH GRAVEL PIT; 2026-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brandon  Robertson → SMITH GRAVEL PIT; 2026-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandon  Robertson → Southeast Gravel Company; 2026-01-05 to current/open; source msha-controller-operator-history