# Relationship history for MSHA mine 0504871

Current hierarchy: **Daren R  Stone; Kathy J  Stone → Stone Sand & Gravel, LLC → Plant #2**

- 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:** Daren R  Stone et al → Plant #2; 2007-03-01 to 2009-05-22; source msha-controller-operator-history
- **operator_operates_mine:** McStone Aggregates LLC → Plant #2; 2007-06-13 to 2010-03-09; source msha-controller-operator-history
- **controller_controls_operator:** Daren R  Stone et al → McStone Aggregates LLC; 2007-06-13 to 2009-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Kathy J  Stone et al → McStone Aggregates LLC; 2007-06-13 to 2009-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Casey N  McClellan et al → Plant #2; 2009-05-23 to 2013-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Casey N  McClellan et al → McStone Aggregates LLC; 2009-05-23 to 2010-03-09; source msha-controller-operator-history
- **controller_controls_operator:** Yvonne  McClellan et al → McStone Aggregates LLC; 2009-05-23 to 2010-03-09; source msha-controller-operator-history
- **operator_operates_mine:** Stone Sand & Gravel, LLC → Plant #2; 2010-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daren R  Stone et al → Plant #2; 2010-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daren R  Stone et al → Stone Sand & Gravel, LLC; 2010-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kathy J  Stone et al → Stone Sand & Gravel, LLC; 2010-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Casey N  McClellan → Plant #2; 2013-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casey N  McClellan → McStone Aggregates LLC; 2013-11-04 to 2010-03-09; source msha-controller-operator-history