# Relationship history for MSHA mine 0301932

Current hierarchy: **LP Aggregates Inc; AOK Rock → Eastern Oklahoma Quarries LLC → Portable Plant #1**

- 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

- **controller_controls_mine:** Scott H  Kaufman  et al → Portable Plant #1; 2004-01-19 to 2005-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Johnelle  Hunt et al → Portable Plant #1; 2005-09-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northwest Arkansas Quarries LLC → Portable Plant #1; 2006-06-20 to 2010-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Johnelle  Hunt et al → Northwest Arkansas Quarries LLC; 2006-06-20 to 2010-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Graham et al → Northwest Arkansas Quarries LLC; 2006-06-20 to 2010-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Scott H  Kaufman  et al → Northwest Arkansas Quarries LLC; 2006-06-20 to 2005-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Oklahoma Quarries LLC → Portable Plant #1; 2010-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** AOK Rock et al → Portable Plant #1; 2010-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** AOK Rock et al → Eastern Oklahoma Quarries LLC; 2010-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LP Aggregates Inc et al → Eastern Oklahoma Quarries LLC; 2010-02-02 to current/open; source msha-controller-operator-history