# Relationship history for MSHA mine 0404074

Current hierarchy: **Nourse Donald G → Enterprise Aggregates Corp → Enterprise Aggregates Corporation**

- 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:** Enterprise Aggregates Corp → Enterprise Aggregates Corporation; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nourse Donald G → Enterprise Aggregates Corporation; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nourse Donald G → Enterprise Aggregates Corp; 1950-01-01 to current/open; source msha-controller-operator-history