# Relationship history for MSHA mine 5001231

Current hierarchy: **Calista Corporation → Brice Incorporated → Brice Inc. Portable #A**

- 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:** Yutan Construction Company → Brice Inc. Portable #A; 1950-01-01 to 1999-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Lewis F  Vondra et al → Brice Inc. Portable #A; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis F  Vondra et al → Yutan Construction Company; 1950-01-01 to 1999-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Brown's Hill Quarry LLC → Brice Inc. Portable #A; 1999-08-28 to 2010-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Sam R  Brice  et al → Brice Inc. Portable #A; 1999-08-28 to 2011-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Sam R  Brice  et al → Brown's Hill Quarry LLC; 1999-08-28 to 2010-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Brice Incorporated → Brice Inc. Portable #A; 2010-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sam R  Brice  et al → Brice Inc. Portable #A; 2010-05-20 to 2011-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Sam R  Brice  et al → Brice Incorporated; 2010-05-20 to 2011-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Calista Corporation → Brice Inc. Portable #A; 2011-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calista Corporation → Brown's Hill Quarry LLC; 2011-05-19 to 2010-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Calista Corporation → Brice Incorporated; 2011-05-19 to current/open; source msha-controller-operator-history