# Relationship history for MSHA mine 1100246

Current hierarchy: **Greg  Kabbes; Richard  Kabbes → Winter Stone Company → Winter Stone Company**

- 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:** Winter Stone Quarry → Winter Stone Company; 1950-01-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Winter Ben → Winter Stone Company; 1950-01-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Winter Ben → Winter Stone Quarry; 1950-01-01 to 1979-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Winter Stone Company → Winter Stone Company; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Kabbes et al → Winter Stone Company; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Kabbes et al → Winter Stone Company; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Kabbes et al → Winter Stone Company; 1980-01-01 to current/open; source msha-controller-operator-history