# Relationship history for MSHA mine 3602216

Current hierarchy: **Daniels Robert → Centennial Coal Company → Centennial Slope**

- 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:** Poponiak Brothers Coal Company → Centennial Slope; 1950-01-01 to 1975-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Poponiak Brothers Coal Co → Centennial Slope; 1950-01-01 to 1975-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Poponiak Brothers Coal Co → Poponiak Brothers Coal Company; 1950-01-01 to 1975-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Centennial Coal Company → Centennial Slope; 1975-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniels Robert → Centennial Slope; 1975-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniels Robert → Centennial Coal Company; 1975-03-18 to current/open; source msha-controller-operator-history