# Relationship history for MSHA mine 4200405

Current hierarchy: **CCI  (Clyde Companies Inc) → Geneva Rock Products Inc → Morgan 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Savage Rock Products → Morgan Pit; 1950-01-01 to 1990-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Savage Industries Inc → Morgan Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Savage Industries Inc → Savage Rock Products; 1950-01-01 to 1990-05-13; source msha-controller-operator-history
- **controller_controls_mine:** CCI  (Clyde Companies Inc) → Morgan Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Geneva Rock Products Inc → Morgan Pit; 1990-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Geneva Rock Products Inc; 1990-05-14 to current/open; source msha-controller-operator-history