# Relationship history for MSHA mine 0800164

Current hierarchy: **Darryl C  Lanker → Dixie Lime & Stone Company → SUMTERVILLE QUARRY**

- 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:** Dixie Lime & Stone Company → SUMTERVILLE QUARRY; 1950-01-01 to 1979-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Rosario Resources Corp → SUMTERVILLE QUARRY; 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 → SUMTERVILLE QUARRY; 1979-08-27 to 1996-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Amcar Inc → SUMTERVILLE QUARRY; 1979-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amcar Inc → Dixie Lime & Stone Company; 1979-08-27 to 1996-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Lime & Stone Company → SUMTERVILLE QUARRY; 1996-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William H  Stavola → SUMTERVILLE QUARRY; 1996-02-16 to 2012-12-27; source msha-controller-operator-history
- **controller_controls_operator:** William H  Stavola → Dixie Lime & Stone Company; 1996-02-16 to 2012-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Darryl C  Lanker → SUMTERVILLE QUARRY; 2012-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darryl C  Lanker → Dixie Lime & Stone Company; 2012-12-28 to current/open; source msha-controller-operator-history