# Relationship history for MSHA mine 4501282

Current hierarchy: **Samuel G  Hurworth → Delhur Inc → Morse Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Clallam County Highway Department → Morse Creek Pit; 1950-01-01 to 1980-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Clallam County-Wa → Morse Creek Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clallam County-Wa → Clallam County Highway Department; 1950-01-01 to 1980-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Samuel G  Hurworth → Morse Creek Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Delhur Inc → Morse Creek Pit; 1980-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Samuel G  Hurworth → Delhur Inc; 1980-04-29 to current/open; source msha-controller-operator-history