# Relationship history for MSHA mine 0301872

Current hierarchy: **Northwest Arkansas Quarries LLC; Rogers Group Inc → Hunt-Rogers Materials LLC → Springdale 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

- **operator_operates_mine:** Carroll County Quarries, LLC → Springdale Quarry; 2003-04-17 to 2004-01-18; source msha-controller-operator-history
- **controller_controls_mine:** Scott H  Kaufman  et al → Springdale Quarry; 2003-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott H  Kaufman  et al → Carroll County Quarries, LLC; 2003-04-17 to 2004-01-18; source msha-controller-operator-history
- **operator_operates_mine:** Northwest Arkansas Quarries, LLC → Springdale Quarry; 2004-01-19 to 2013-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Scott H  Kaufman  et al → Springdale Quarry; 2004-01-19 to 2005-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Scott H  Kaufman  et al → Northwest Arkansas Quarries, LLC; 2004-01-19 to 2005-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Graham et al → Springdale Quarry; 2005-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Graham et al → Northwest Arkansas Quarries, LLC; 2005-09-28 to 2013-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Johnelle  Hunt et al → Northwest Arkansas Quarries, LLC; 2005-09-28 to 2013-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Hunt-Rogers Materials LLC → Springdale Quarry; 2013-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Group Inc → Springdale 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:** Rogers Group Inc et al → Springdale Quarry; 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
- **controller_controls_operator:** Northwest Arkansas Quarries LLC et al → Hunt-Rogers Materials LLC; 2016-04-26 to current/open; source msha-controller-operator-history