# Relationship history for MSHA mine 4703784

Current hierarchy: **Jim  Bucheger; Tim  Dragovich; Evan  Bucheger → Glacial Stone, LLC. → Sorting Machine**

- 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:** Jim Bucheger Excavating → Sorting Machine; 2016-07-26 to 2025-06-09; source msha-controller-operator-history
- **controller_controls_mine:** James A  Bucheger → Sorting Machine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Bucheger → Jim Bucheger Excavating; 2016-07-26 to 2025-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Glacial Stone LLC → Sorting Machine; 2025-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Evan  Bucheger et al → Sorting Machine; 2025-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Evan  Bucheger et al → Glacial Stone LLC; 2025-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Dragovich et al → Glacial Stone LLC; 2025-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Bucheger et al → Glacial Stone LLC; 2025-06-10 to current/open; source msha-controller-operator-history