# Relationship history for MSHA mine 3500477

Current hierarchy: **Morse Brothers Inc → Morse Brothers Inc → Tremaine Pit & Plant**

- 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:** Wildish Corvallis Company → Tremaine Pit & Plant; 1950-01-01 to 1984-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Wildish Land Company → Tremaine Pit & Plant; 1950-01-01 to 1984-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Wildish Land Company → Wildish Corvallis Company; 1950-01-01 to 1984-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Morse Brothers Inc → Tremaine Pit & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Morse Brothers Inc → Tremaine Pit & Plant; 1984-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Morse Brothers Inc → Morse Brothers Inc; 1984-07-23 to current/open; source msha-controller-operator-history