# Relationship history for MSHA mine 2100005

Current hierarchy: **CVI → Biesanz Stone → WINONA 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:** Biesanz Stone Company → WINONA QUARRY; 1950-01-01 to 2024-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Charles W  Biesanz → WINONA QUARRY; 1950-01-01 to 2011-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Charles W  Biesanz → Biesanz Stone Company; 1950-01-01 to 2011-06-26; source msha-controller-operator-history
- **controller_controls_mine:** 6K LLC et al → WINONA QUARRY; 2011-06-27 to 2020-11-16; source msha-controller-operator-history
- **controller_controls_operator:** 6K LLC et al → Biesanz Stone Company; 2011-06-27 to 2020-11-16; source msha-controller-operator-history
- **controller_controls_operator:** CVI  et al → Biesanz Stone Company; 2011-06-27 to 2020-11-16; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Stahlecker et al → Biesanz Stone Company; 2011-06-27 to 2020-11-16; source msha-controller-operator-history
- **controller_controls_mine:** CVI et al → WINONA QUARRY; 2020-11-17 to 2022-06-29; source msha-controller-operator-history
- **controller_controls_operator:** CVI et al → Biesanz Stone Company; 2020-11-17 to 2022-06-29; source msha-controller-operator-history
- **controller_controls_operator:** 6K LLC et al → Biesanz Stone Company; 2020-11-17 to 2022-06-29; source msha-controller-operator-history
- **controller_controls_mine:** CVI → WINONA QUARRY; 2022-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CVI → Biesanz Stone Company; 2022-06-30 to 2024-05-30; source msha-controller-operator-history
- **operator_operates_mine:** Biesanz Stone → WINONA QUARRY; 2024-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CVI → WINONA QUARRY; 2024-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CVI → Biesanz Stone; 2024-05-31 to current/open; source msha-controller-operator-history