# Relationship history for MSHA mine 4103188

Current hierarchy: **Jones Jimmy C Sr → Cortex Industries Inc → Sherman 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

- **operator_operates_mine:** Cortex Industries Inc → Sherman Pit; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Jimmy C Sr → Sherman Pit; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Jimmy C Sr → Cortex Industries Inc; 1983-07-01 to current/open; source msha-controller-operator-history