# Relationship history for MSHA mine 0504557

Current hierarchy: **Casey N  McClellan → McStone Aggregates LLC → New Haycamp**

- 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:** Stone Crushing → New Haycamp; 1995-03-01 to 2007-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Kathy J  Stone et al → New Haycamp; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kathy J  Stone et al → Stone Crushing; 1995-03-01 to 2007-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Daren R  Stone et al → Stone Crushing; 1995-03-01 to 2007-02-28; source msha-controller-operator-history
- **operator_operates_mine:** McStone Aggregates LLC → New Haycamp; 2007-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daren R  Stone et al → New Haycamp; 2007-03-01 to 2009-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Daren R  Stone et al → McStone Aggregates LLC; 2007-03-01 to 2009-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Kathy J  Stone et al → McStone Aggregates LLC; 2007-03-01 to 2009-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Yvonne  McClellan et al → New Haycamp; 2009-05-23 to 2013-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Yvonne  McClellan et al → McStone Aggregates LLC; 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 2013-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Casey N  McClellan → New Haycamp; 2013-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casey N  McClellan → McStone Aggregates LLC; 2013-11-04 to current/open; source msha-controller-operator-history