# Relationship history for MSHA mine 1519212

Current hierarchy: **Rogers Group Inc → Rogers Group, Inc. → Oldham County Stone - Horner**

- 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 → Oldham County Stone - Horner; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group, Inc. → Oldham County Stone - Horner; 2008-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group, Inc.; 2008-05-06 to current/open; source msha-controller-operator-history