# Relationship history for MSHA mine 4003303

Current hierarchy: **Jon Munroe  Kraus → Silvara Stone Co LLC → M & M Flag Stone**

- 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

- **operator_operates_mine:** M & M Flag Stone → M & M Flag Stone; 2007-08-23 to 2017-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Ritchey → M & M Flag Stone; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Ritchey → M & M Flag Stone; 2007-08-23 to 2017-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Jon Munroe  Kraus → M & M Flag Stone; 2014-01-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silvara Stone Co LLC → M & M Flag Stone; 2017-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon Munroe  Kraus → Silvara Stone Co LLC; 2017-06-06 to current/open; source msha-controller-operator-history