# Relationship history for MSHA mine 4608502

Current hierarchy: **Horizon Natural Resources Incorporated → Cannelton Industries Inc → Mine No 140 (3)**

- 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

- **controller_controls_mine:** Cyprus Amax Minerals Company → Mine No 140 (3); 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cannelton Industries Inc → Mine No 140 (3); 1995-06-01 to 1998-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Cannelton Industries Inc; 1995-06-01 to 1998-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Cannelton Industries Inc → Mine No 140 (3); 1998-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Mine No 140 (3); 1998-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Cannelton Industries Inc; 1998-06-29 to current/open; source msha-controller-operator-history