# Relationship history for MSHA mine 2102633

Current hierarchy: **Gary A  Kruckow → Kruckow Construction Company → Conniff 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 → Conniff Quarry; 1978-03-09 to 1981-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Gary A  Kruckow et al → Conniff Quarry; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kruckow Construction Company → Conniff Quarry; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Kruckow et al → Kruckow Construction Company; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lowell  Botcher  et al → Conniff 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 1981-03-31; source msha-controller-operator-history
- **controller_controls_operator:** James  Botcher  et al → Botcher Construction Company; 2002-04-24 to 1981-03-31; source msha-controller-operator-history