# Relationship history for MSHA mine 1519481

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Albany 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Rogers Group Inc → Albany Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Albany Farms , LLC → Albany Quarry; 2010-04-20 to 2025-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Wallace R  Carter et al → Albany Quarry; 2010-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wallace R  Carter et al → Albany Farms , LLC; 2010-04-20 to 2025-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Jan M  Carter et al → Albany Farms , LLC; 2010-04-20 to 2025-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Albany Quarry; 2025-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2025-02-21 to current/open; source msha-controller-operator-history