# Relationship history for MSHA mine 4003158

Current hierarchy: **Per O  Loseth → Whetstone Mountain Management Inc → WHETSTONE 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:** Whetstone Mountain Management Inc → WHETSTONE QUARRY; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Per O  Loseth → WHETSTONE QUARRY; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Per O  Loseth → Whetstone Mountain Management Inc; 2000-04-01 to current/open; source msha-controller-operator-history