# Relationship history for MSHA mine 4002124

Current hierarchy: **Creswell Stanley Jr → Creswell Sand & Gravel Ltd → Creswell Brothers Dredge**

- 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:** Creswell Sand & Gravel Ltd → Creswell Brothers Dredge; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Creswell Stanley Jr Et Al → Creswell Brothers Dredge; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Creswell Stanley Jr Et Al → Creswell Sand & Gravel Ltd; 1950-01-01 to current/open; source msha-controller-operator-history