# Relationship history for MSHA mine 0504763

Current hierarchy: **Daren R  Stone; Kathy J  Stone → Stone Sand & Gravel, LLC → Thunderbird Wash Plant/Eagle Brand Sand**

- 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:** Aryol W  Brumley et al → Thunderbird Wash Plant/Eagle Brand Sand; 2000-07-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Haycamp Gravel → Thunderbird Wash Plant/Eagle Brand Sand; 2003-03-10 to 2007-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Aryol W  Brumley et al → Haycamp Gravel; 2003-03-10 to 2007-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Terry R  Gorsuch et al → Haycamp Gravel; 2003-03-10 to 2007-02-28; source msha-controller-operator-history
- **operator_operates_mine:** McStone Aggregates LLC → Thunderbird Wash Plant/Eagle Brand Sand; 2007-03-01 to 2010-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Kathy J  Stone et al → Thunderbird Wash Plant/Eagle Brand Sand; 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_operator:** Daren R  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 → Thunderbird Wash Plant/Eagle Brand Sand; 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 2010-03-09; 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
- **operator_operates_mine:** Stone Sand & Gravel, LLC → Thunderbird Wash Plant/Eagle Brand Sand; 2010-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daren R  Stone et al → Thunderbird Wash Plant/Eagle Brand Sand; 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 → Thunderbird Wash Plant/Eagle Brand Sand; 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