# Relationship history for MSHA mine 1100087

Current hierarchy: **Kutz M F → M F Kutz → M.F. KUTZ QUARRY**

- 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:** C J Kutz → M.F. KUTZ QUARRY; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kutz C J → M.F. KUTZ QUARRY; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Kutz C J → C J Kutz; 1950-01-01 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** M F Kutz → M.F. KUTZ QUARRY; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kutz M F → M.F. KUTZ QUARRY; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kutz M F → M F Kutz; 1987-01-01 to current/open; source msha-controller-operator-history