# Relationship history for MSHA mine 2101720

Current hierarchy: **Lowell  Botcher; James  Botcher → Botcher Construction Company → Gap Hill Quarry And Mill**

- 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:** Botcher Construction Company → Gap Hill Quarry And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Botcher  et al → Gap Hill Quarry And Mill; 2002-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Botcher  et al → Botcher Construction Company; 2002-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lowell  Botcher  et al → Botcher Construction Company; 2002-04-24 to current/open; source msha-controller-operator-history