# Relationship history for MSHA mine 3400117

Current hierarchy: **MB Holdings LLC; Jed  Winters → Mangum Brick Company → Mangum Brick Company**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Mangum Brick Company → Mangum Brick Company; 1950-01-01 to 2010-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Jewett  Scott → Mangum Brick Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jewett  Scott → Mangum Brick Company; 1950-01-01 to 2010-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Mangum Brick Company → Mangum Brick Company; 2010-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jed  Winters et al → Mangum Brick Company; 2010-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jed  Winters et al → Mangum Brick Company; 2010-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MB Holdings LLC et al → Mangum Brick Company; 2010-03-11 to current/open; source msha-controller-operator-history