# Relationship history for MSHA mine 0100327

Current hierarchy: ** → PB Service, LLC. → Flat Top**

- 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:** Jim Walter Resources Inc → Flat Top; 1950-01-01 to 2011-09-08; source msha-controller-operator-history
- **controller_controls_mine:** Walter Energy Incorporated → Flat Top; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter Energy Incorporated → Jim Walter Resources Inc; 1950-01-01 to 2011-09-08; source msha-controller-operator-history