# Relationship history for MSHA mine 3200590

Current hierarchy: **Fran  Schoonover → Schoonover Brothers → Ransom County Pit (Jorgenson 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:** Schoonover Brothers → Ransom County Pit (Jorgenson Pit); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fran  Schoonover et al → Ransom County Pit (Jorgenson Pit); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fran  Schoonover et al → Schoonover Brothers; 1950-01-01 to current/open; source msha-controller-operator-history