# Relationship history for MSHA mine 4503056

Current hierarchy: **Elroy  Kutzer → Kutzer Rock Crushing → KUTZER ROCK CRUSHING**

- 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:** Kutzer Rock Crushing → KUTZER ROCK CRUSHING; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elroy  Kutzer → KUTZER ROCK CRUSHING; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elroy  Kutzer → Kutzer Rock Crushing; 1985-07-01 to current/open; source msha-controller-operator-history