# Relationship history for MSHA mine 0800874

Current hierarchy: **Amcar Inc → Dixie Lime & Stone Company → Dix-Fil 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Dixie Lime & Stone Company → Dix-Fil Plant; 1950-01-01 to 1979-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Rosario Resources Corp → Dix-Fil Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rosario Resources Corp → Dixie Lime & Stone Company; 1950-01-01 to 1979-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Lime & Stone Company → Dix-Fil Plant; 1979-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Amcar Inc → Dix-Fil Plant; 1979-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amcar Inc → Dixie Lime & Stone Company; 1979-08-27 to current/open; source msha-controller-operator-history