# Relationship history for MSHA mine 0404971

Current hierarchy: **Calico Holdings Corp → Calico Rock Milling Inc → White Mountain 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** H M  Peterson → White Mountain Quarry; 1950-01-01 to 1989-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Calico Rock Milling Inc → White Mountain Quarry; 1988-10-01 to 1989-02-10; source msha-controller-operator-history
- **controller_controls_operator:** H M  Peterson → Calico Rock Milling Inc; 1988-10-01 to 1989-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Calico Rock Milling Inc → White Mountain Quarry; 1989-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calico Holdings Corp → White Mountain Quarry; 1989-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calico Holdings Corp → Calico Rock Milling Inc; 1989-02-11 to current/open; source msha-controller-operator-history