# Relationship history for MSHA mine 2501099

Current hierarchy: **Fred  Beekman; Norma  Beekman → Homestead Redimix Inc → Zimmerman 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:** Homestead Redimix Inc → Zimmerman Pit; 1988-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred  Beekman et al → Zimmerman Pit; 1988-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Beekman et al → Homestead Redimix Inc; 1988-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norma  Beekman et al → Homestead Redimix Inc; 1988-02-01 to current/open; source msha-controller-operator-history