# Relationship history for MSHA mine 2100008

Current hierarchy: **Lowell  Botcher; James  Botcher → Botcher Construction Company → Kelly 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:** Botcher Construction Company → Kelly Quarry; 1980-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lowell  Botcher  et al → Kelly Quarry; 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
- **controller_controls_operator:** James  Botcher  et al → Botcher Construction Company; 2002-04-24 to current/open; source msha-controller-operator-history