# Relationship history for MSHA mine 2400420

Current hierarchy: **Steve  Fossum; Scott  Fossum; Carol  Fossum → Fossum Ready Mix → Belzer 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:** Fossum Ready Mix → Belzer Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Orville G  Fossum → Belzer Pit; 1950-01-01 to 2014-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Orville G  Fossum → Fossum Ready Mix; 1950-01-01 to 2014-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Fossum et al → Belzer Pit; 2014-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Fossum et al → Fossum Ready Mix; 2014-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carol  Fossum et al → Fossum Ready Mix; 2014-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Fossum et al → Fossum Ready Mix; 2014-03-09 to current/open; source msha-controller-operator-history