# Relationship history for MSHA mine 0404141

Current hierarchy: **Richard H  Kreth → Kreth Inc → Irish Hill Aggregate**

- 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:** Gerry Ninnis Enterprises Inc → Irish Hill Aggregate; 1950-01-01 to 1995-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Gerry  Ninnis → Irish Hill Aggregate; 1950-01-01 to 1995-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Gerry  Ninnis → Gerry Ninnis Enterprises Inc; 1950-01-01 to 1995-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Richard H  Kreth → Irish Hill Aggregate; 1993-08-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kreth Inc → Irish Hill Aggregate; 1995-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Kreth → Kreth Inc; 1995-02-15 to current/open; source msha-controller-operator-history