# Relationship history for MSHA mine 1800768

Current hierarchy: **Aggregate Management, Inc → Savage Stone, LLC → Savage 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Savage Stone, LLC → Savage Stone; 2005-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Caleb  Gould et al → Savage Stone; 2005-09-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Caleb  Gould et al → Savage Stone, LLC; 2005-09-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ronald A  Matovcik et al → Savage Stone, LLC; 2005-09-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Management, Inc → Savage Stone; 2016-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Management, Inc → Savage Stone, LLC; 2016-01-01 to current/open; source msha-controller-operator-history