# Relationship history for MSHA mine 4003240

Current hierarchy: **Jon Munroe  Kraus → Silvara Stone Co., LLC → Winningham 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

- **controller_controls_mine:** James  Botbyl → Winningham Quarry; 2004-07-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silvara Industries Inc → Winningham Quarry; 2004-07-26 to 2015-07-12; source msha-controller-operator-history
- **controller_controls_operator:** James  Botbyl → Silvara Industries Inc; 2004-07-26 to 2015-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Jon Munroe  Kraus → Winningham Quarry; 2014-01-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silvara Stone Co., LLC → Winningham Quarry; 2015-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon Munroe  Kraus → Silvara Stone Co., LLC; 2015-07-13 to current/open; source msha-controller-operator-history