# Relationship history for MSHA mine 4101032

Current hierarchy: **Hong Franklin L → Apache Ready Mix Inc → Apache Materials**

- 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:** Acme Sand Company → Apache Materials; 1950-01-01 to 1979-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Acme Sand Company → Apache Materials; 1950-01-01 to 1979-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Acme Sand Company → Acme Sand Company; 1950-01-01 to 1979-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Apache Materials Inc → Apache Materials; 1979-11-15 to 1985-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Chapa Eleazar → Apache Materials; 1979-11-15 to 1985-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Chapa Eleazar → Apache Materials Inc; 1979-11-15 to 1985-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Apache Ready Mix Inc → Apache Materials; 1985-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hong Franklin L → Apache Materials; 1985-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hong Franklin L → Apache Ready Mix Inc; 1985-01-22 to current/open; source msha-controller-operator-history