# Relationship history for MSHA mine 1202371

Current hierarchy: **David A  Fiechter; Chase M  Fiechter → Rock Creek Stone Quarry → Rock Creek Stone 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Rock Creek Materials, L.L.C. → Rock Creek Stone Quarry; 2005-02-22 to 2012-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Darin L  Johnson et al → Rock Creek Stone Quarry; 2005-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darin L  Johnson et al → Rock Creek Materials, L.L.C.; 2005-02-22 to 2012-12-20; source msha-controller-operator-history
- **controller_controls_operator:** David  Fogg et al → Rock Creek Materials, L.L.C.; 2005-02-22 to 2012-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Rock Creek Stone Quarry → Rock Creek Stone Quarry; 2012-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chase M  Fiechter et al → Rock Creek Stone Quarry; 2012-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chase M  Fiechter et al → Rock Creek Stone Quarry; 2012-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David A  Fiechter et al → Rock Creek Stone Quarry; 2012-12-21 to current/open; source msha-controller-operator-history