# Relationship history for MSHA mine 3601614

Current hierarchy: **Warnetsky Joseph → American Silt Processing Company → American Silt Washery**

- 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:** American Silt Processing Company → American Silt Washery; 1977-04-01 to 1979-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Brojack Peter → American Silt Washery; 1977-04-01 to 1979-02-25; source msha-controller-operator-history
- **controller_controls_operator:** Brojack Peter → American Silt Processing Company; 1977-04-01 to 1979-02-25; source msha-controller-operator-history
- **operator_operates_mine:** American Silt Processing Company → American Silt Washery; 1979-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Warnetsky Joseph → American Silt Washery; 1979-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Warnetsky Joseph → American Silt Processing Company; 1979-02-26 to current/open; source msha-controller-operator-history