# Relationship history for MSHA mine 2301398

Current hierarchy: **Jane E  Martin → Dredging Inc → DREDGING INC**

- 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:** Dredging Inc → DREDGING INC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jane E  Martin → DREDGING INC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jane E  Martin → Dredging Inc; 1950-01-01 to current/open; source msha-controller-operator-history