# Relationship history for MSHA mine 1601239

Current hierarchy: **Robert  Feucht → E B Feucht & Sons Inc → FEUCHT SAND 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:** Martel Truck & Tractor Service Inc → FEUCHT SAND PIT; 1992-05-01 to 1994-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Ronald  Martel → FEUCHT SAND PIT; 1992-05-01 to 1994-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Martel → Martel Truck & Tractor Service Inc; 1992-05-01 to 1994-06-20; source msha-controller-operator-history
- **operator_operates_mine:** E B Feucht & Sons Inc → FEUCHT SAND PIT; 1994-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Feucht → FEUCHT SAND PIT; 1994-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Feucht → E B Feucht & Sons Inc; 1994-06-21 to current/open; source msha-controller-operator-history