# Relationship history for MSHA mine 1002326

Current hierarchy: **Wade  Olson → OK Gravel Works → KPI-JCI CONE/JAW**

- 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:** Wade  Olson → KPI-JCI CONE/JAW; 2012-07-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** OK Gravel Works → KPI-JCI CONE/JAW; 2020-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wade  Olson → OK Gravel Works; 2020-10-19 to current/open; source msha-controller-operator-history