# Relationship history for MSHA mine 1001448

Current hierarchy: **Bernie  Kaschmitter; Tim  Kaschmitter → Camas Gravel Company → Barnes Pit**

- 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

- **controller_controls_mine:** Tim  Kaschmitter  et al → Barnes Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camas Gravel Company → Barnes Pit; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Kaschmitter  et al → Camas Gravel Company; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernie  Kaschmitter  et al → Camas Gravel Company; 1980-02-01 to current/open; source msha-controller-operator-history