# Relationship history for MSHA mine 1001455

Current hierarchy: **Bernie  Kaschmitter; Tim  Kaschmitter → Camas Gravel Company → Doumecq 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Tim  Kaschmitter  et al → Doumecq Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camas Gravel Company → Doumecq Pit; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Kaschmitter  et al → Camas Gravel Company; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernie  Kaschmitter  et al → Camas Gravel Company; 1980-03-01 to current/open; source msha-controller-operator-history