# Relationship history for MSHA mine 0301966

Current hierarchy: **Northwest Arkansas Quarries LLC; Rogers Group Inc → Hunt-Rogers Materials LLC → Farmington 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 → Farmington Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc → Farmington Quarry; 2008-05-13 to 2013-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc; 2008-05-13 to 2013-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Hunt-Rogers Materials LLC → Farmington Quarry; 2013-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Group Inc → Farmington Quarry; 2013-04-01 to 2016-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Hunt-Rogers Materials LLC; 2013-04-01 to 2016-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Northwest Arkansas Quarries LLC et al → Farmington Quarry; 2016-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Northwest Arkansas Quarries LLC et al → Hunt-Rogers Materials LLC; 2016-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc et al → Hunt-Rogers Materials LLC; 2016-04-26 to current/open; source msha-controller-operator-history