# Relationship history for MSHA mine 1103150

Current hierarchy: **Terence L  Brandt → Savanna Quarry, Inc. → Savanna 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

- **operator_operates_mine:** Savanna Quarry, Inc. → Savanna Quarry; 2005-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald  Bjustrom et al → Savanna Quarry; 2005-07-19 to 2026-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Bjustrom et al → Savanna Quarry, Inc.; 2005-07-19 to 2026-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Brandt et al → Savanna Quarry, Inc.; 2005-07-19 to 2026-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Terence L  Brandt → Savanna Quarry; 2026-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terence L  Brandt → Savanna Quarry, Inc.; 2026-08-12 to current/open; source msha-controller-operator-history