# Relationship history for MSHA mine 0405198

Current hierarchy: **Stolworthy Burl → Burl Stolworthy Flood Control Maintenance → Boseker Ranch Channel Rehabilitation Pro**

- 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

- **operator_operates_mine:** Burl Stolworthy Flood Control Maintenance → Boseker Ranch Channel Rehabilitation Pro; 1992-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stolworthy Burl → Boseker Ranch Channel Rehabilitation Pro; 1992-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stolworthy Burl → Burl Stolworthy Flood Control Maintenance; 1992-08-01 to current/open; source msha-controller-operator-history